CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net loss	$ (7,604,000)	$ (23,681,000)
Less:
Loss from discontinued operations	1,585,000	(11,241,000)
Loss from continuing operations	(9,189,000)	(12,440,000)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation	515,000	265,000
Charge for 401(k) company common stock match	281,000	323,000
Stock-based compensation	848,000	2,128,000
Inventory impairment	199,000	209,000
Gain on sale of discontinued operation and property and equipment	(9,833,000)	(33,000)
Non-cash restructuring expense paid through stock and equipment	196,000	0
Changes in operating assets and liabilities:
Accounts receivable	172,000	(193,000)
Due from related parties	145,000	(34,000)
Unbilled receivables	29,000	270,000
Inventory	180,000	(2,000)
Prepaid expenses and other assets	1,302,000	(1,081,000)
Accounts payable	(51,000)	(226,000)
Accrued expenses	(845,000)	62,000
Contract termination obligation and other long-term liabilities	339,000	0
Deferred revenue	(277,000)	130,000
Taxes paid on employees' behalf related to vesting of stock awards	(296,000)	0
Net cash used in operating activities	(14,700,000)	(21,863,000)
Cash flows from investing activities
Purchase of property and equipment	(752,000)	(654,000)
Proceeds from sale of discontinued operation and property and equipment	10,317,000	40,000
Change in restricted cash	187,000	0
Net cash provided (used) by investing activities	9,752,000	(614,000)
Cash flows from financing activities
Proceeds from private placement offering, net of issuance costs	0	14,703,000
Net cash provided by financing activities	0	14,703,000
Effect of exchange rate changes on cash and cash equivalents	(12,000)	(3,000)
Net decrease in cash and cash equivalents	(4,960,000)	(7,777,000)
Cash and cash equivalents at beginning of period	12,269,000	20,046,000
Cash and cash equivalents at end of period	7,309,000	12,269,000
Supplemental disclosure of non-cash information:
Purchase of property and equipment included in accounts payable and accrued expenses	0	68,000
Lease incentive paid by lessor	1,332,000	0
Transfer of equipment to settle contractual liability	111,000	0
Issuance of common stock to settle contractual liability	85,000	0
Issuance of stock in connection with Aspire agreement	0	450,000
Restricted stock units issued to settle incentive compensation obligation	$ 0	$ 305,000