3. Trade Receivables, net (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Trade receivables	$ 323	$ 378
Conforming EPTAs	71	94
Gross trade receivables	400	504
Less allowance for doubtful accounts	(51)	(59)
Trade receivables, net	349	445
Current trade receivables, net	303	364
Long-term trade receivables, net	46	81
Trade receivables, net	349	445
1 - 30 Days
Valuation and Qualifying Accounts Disclosure [Line Items]
Non-Conforming EPTAs	4	11
31 - 60 Days
Valuation and Qualifying Accounts Disclosure [Line Items]
Non-Conforming EPTAs	0	4
61 To 90 Days
Valuation and Qualifying Accounts Disclosure [Line Items]
Non-Conforming EPTAs	$ 2	$ 17