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"accn":"0001193125-16-579808","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-05"},{"end":"2015-12-31","val":430000,"accn":"0001193125-16-676820","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09"},{"end":"2015-12-31","val":430000,"accn":"0001193125-16-755505","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-01"},{"end":"2015-12-31","val":430000,"accn":"0000827809-17-000012","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-30","frame":"CY2015Q4I"},{"end":"2016-03-31","val":461000,"accn":"0001193125-16-579808","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-05","frame":"CY2016Q1I"},{"end":"2016-06-30","val":467000,"accn":"0001193125-16-676820","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":270000,"accn":"0001193125-16-755505","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-01","frame":"CY2016Q3I"},{"end":"2016-12-31","val":4159000,"accn":"0000827809-17-000012","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-30"},{"end":"2016-12-31","val":4159000,"accn":"0000827809-17-000030","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-09"},{"end":"2016-12-31","val":4159000,"accn":"0000827809-17-000038","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-08"},{"end":"2016-12-31","val":4159000,"accn":"0000827809-17-000052","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-09"},{"end":"2016-12-31","val":4159000,"accn":"0000827809-18-000006","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2016Q4I"},{"end":"2017-03-31","val":3941000,"accn":"0000827809-17-000030","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-09","frame":"CY2017Q1I"},{"end":"2017-06-30","val":3744000,"accn":"0000827809-17-000038","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-08","frame":"CY2017Q2I"},{"end":"2017-09-30","val":3450000,"accn":"0000827809-17-000052","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-09","frame":"CY2017Q3I"},{"end":"2017-12-31","val":2920000,"accn":"0000827809-18-000006","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16"},{"end":"2017-12-31","val":2920000,"accn":"0000827809-18-000016","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-10"},{"end":"2017-12-31","val":2920000,"accn":"0000827809-18-000032","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-07"},{"end":"2017-12-31","val":2920000,"accn":"0000827809-18-000040","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-13"},{"end":"2017-12-31","val":2920000,"accn":"0000827809-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-15","frame":"CY2017Q4I"},{"end":"2018-03-31","val":2766000,"accn":"0000827809-18-000016","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-10","frame":"CY2018Q1I"},{"end":"2018-06-30","val":2375000,"accn":"0000827809-18-000032","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-07","frame":"CY2018Q2I"},{"end":"2018-09-30","val":1967000,"accn":"0000827809-18-000040","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-13","frame":"CY2018Q3I"},{"end":"2018-12-31","val":1585000,"accn":"0000827809-19-000005","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-15"},{"end":"2018-12-31","val":1585000,"accn":"0000827809-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-07","frame":"CY2018Q4I"},{"end":"2019-03-31","val":1209000,"accn":"0000827809-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-07","frame":"CY2019Q1I"}]}},"PropertyPlantAndEquipmentSalvageValue":{"label":"Property, Plant, and Equipment, Salvage Value","description":"The estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose).","units":{"USD":[{"end":"2015-12-31","val":0,"accn":"0000827809-17-000012","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-30","frame":"CY2015Q4I"}]}},"ReceivablesFairValueDisclosure":{"label":"Receivables, Fair Value Disclosure","description":"Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.","units":{"USD":[{"end":"2015-12-31","val":2000000,"accn":"0000827809-17-000012","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-30","frame":"CY2015Q4I"}]}},"ReceivablesNetCurrent":{"label":"Receivables, Net, Current","description":"The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes 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longer.","units":{"USD":[{"start":"2018-01-01","end":"2018-03-31","val":0,"accn":"0000827809-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-07","frame":"CY2018Q1"},{"start":"2019-01-01","end":"2019-03-31","val":2996000,"accn":"0000827809-19-000012","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-07","frame":"CY2019Q1"}]}},"ResearchAndDevelopmentExpense":{"label":"Research and Development Expense","description":"The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period 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