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Other Financial Statement Information (Tables)
 12 Months Ended
Dec. 31, 2017
Other Financial Statement Information [Abstract]  
Schedule of inventories
  December 31,  December 31, 
  2017  2016 
Finished goods $719  $138 
Work-in-process  132   447 
Total inventories $851  $585
Schedule of supplemental cash flow information
  2017  2016 
Cash paid for interest $640  $363 
Cash paid for taxes $5  $11 
Non-cash Investing and Financing Activities        
Noncash preferred stock dividends $246  $463 
Issuance of notes in exchange for accounts payable $-  $288 
Issuance of stock upon conversion of preferred stock $2,246  $307 
Issuance of warrants with term loan extensions $2,218   361 
Issuance of stock in exchange for accounts payable $-  $86