Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES:
Net income (loss)	$ (1,249)	$ 17,330
Income from discontinued operations		(18,799)
Net loss from continuing operations	(1,249)	(1,469)
Adjustments to reconcile net loss from continuing operations to net cash used for operating activities:
Depreciation and amortization	248	217
Stock-based compensation expense	31	19
Non-cash investment and interest income (loss), net	750	1,005
Equity in loss of affiliate company	43	14
Loss on disposal of property and equipment	1
Changes in operating assets and liabilities:
Accounts receivable, net	(367)	(461)
Other current assets	(562)	(2,508)
Other long term assets	(42)	22
Accounts payable	223	(12)
Accrued payroll	20	(87)
Deferred revenue, current portion	(356)	1,220
Accrued expenses	18	1
Other current liabilities	95	(31)
Deferred revenue, net of current portion	(110)	4
Net cash used for operating activities	(1,257)	(2,066)
INVESTING ACTIVITIES:
Purchases of property and equipment	(313)	(272)
Purchase of long-term investment	(50)	(430)
Proceeds from sale of long-term investments	4,448
Net cash provided by (used for) investing activities	4,085	(702)
FINANCING ACTIVITIES:
Distribution of dividend to stockholders	(3,056)
Sale of capital stock pursuant to exercise of option	14	8
Repurchase of capital stock pursuant to tender offer		(692)
Net cash used for financing activities	(3,042)	(684)
Net cash used for operating activities from discontinued operations	(120)	(189)
Net cash provided by investing activities from discontinued operations		19,082
Net cash provided by (used for) discontinued operations	(120)	18,893
Effects of exchange rate changes on cash	(1)	(6)
Net increase (decrease) in cash	(335)	15,435
Cash at beginning of year	18,059	2,624
Cash at end of year	17,724	18,059
Supplemental disclosure of cash flow information:
Cash paid for income taxes	120
Unfunded investment in privately-held technology company	$ 1,000