CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net cash used in operating activities	$ (6,205)	$ (9,935)
Cash flows from investing activities:
Proceeds from sale of assets	1,167	789
Capitalized costs and acquisitions of property, plant and equipment	(50)	(44)
Net cash from investing activities	1,117	745
Cash flows from financing activities:
Proceeds from issuance of common stock	3,599
Proceeds from the issuance of convertible note		5,000
Convertible note costs		(312)
Net cash from financing activities	3,599	4,688
Net decrease in cash and cash equivalents	(1,489)	(4,502)
Cash and cash equivalents, beginning of period	4,077	8,579
Cash and cash equivalents, end of period	$ 2,588	$ 4,077