Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net loss	$ (9,485)	$ (11,437)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation and amortization	41	77
Stock-based compensation	875	1,064
Provision (Benefit) of receivable reserves	37	(9)
(Gain) Loss on deconsolidation of a fully-owned subsidiary	(230)	(183)
Changes in operating assets and liabilities:
Accounts receivable	818	1,544
Prepaids and other	(88)	21
Other non-current assets	(4)	51
Accounts payable and accrued expenses	(469)	(62)
Unearned revenue and deferred maintenance	(918)	406
Other noncurrent liabilities	(184)	144
Net cash used for operating activities	(9,607)	(8,384)
Cash flows from investing activities:
Purchase of property and equipment	(14)	(16)
Purchase of short-term investment	(10,666)	(21,931)
Maturities of short-term investment	22,223	14,538
Net cash provided by (used for) by investing activities	11,543	(7,409)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	181	275
Proceeds from exercise of common stock options, net	11
Net cash provided by financing activities	192	275
Effect of exchange rates on cash and cash equivalents	2	177
Net increase (decrease) in cash and cash equivalents	2,130	(15,341)
Cash and cash equivalents at beginning of year	9,600	24,941
Cash and cash equivalents at end of year	11,730	9,600
Supplemental cash flows disclosures:
Cash paid for income taxes	$ 6	$ 1