CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net cash used in operating activities	$ (5,123)	$ (8,030)
Cash flows from investing activities:
Proceeds from sale of assets	898	416
Capitalized costs and acquisitions of property, plant and equipment	(36)	(44)
Net cash from investing activities	862	372
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issue costs	3,599
Net cash from financing activities	3,599
Net decrease in cash and cash equivalents	(662)	(7,658)
Cash and cash equivalents, beginning of period	4,077	8,579
Cash and cash equivalents, end of period	$ 3,415	$ 921