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Equity - Stock-Based Compensation Expense Included in Statements of Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Total stock compensation expense $ 89 $ 661
Cost of Sales [Member]    
Total stock compensation expense [1] 16
Research and Development Expense [Member]    
Total stock compensation expense [1] 4
Selling General and Administrative Expense [Member]    
Total stock compensation expense [1] $ 89 $ 641
[1] Includes $16, $4 and $59 in Cost of sales, Research and development expense and Selling, general and administrative expense, respectively, for the year ended December 31, 2015 with respect to DSIT. See Note 4 with respect to stock-based compensation expense associated with discontinued operations.