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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Cash flows from (used in) operating activities    
Net income $ 915 $ 540
Adjustments to reconcile net income to net cash from (used in) operating activities:    
Depreciation and amortization 120 82
Gain on sale of available-for-sale securities (1,008) (530)
Deferred income taxes (17) (21)
Interest accrued on investments (2) (4)
Stock-based compensation expense 51 149
Loss on disposal of property and equipment 1 0
Change in allowance for doubtful accounts 0 (2)
Change in, net of acquisition:    
Trade receivables (127) (126)
Inventories (205) 70
Current assets, other 1 (83)
Accounts payable 157 2
Accrued expenses 180 147
Accrued income taxes 51 (289)
Net cash from (used in) operating activities 117 (65)
Cash flows from (used in) investing activities    
Proceeds from sale of available-for-sale securities 1,020 536
Purchase of treasury bills (9,676) (5,426)
Proceeds from the maturity of treasury bills 8,362 5,251
Cash paid for acquisition (400) 0
Purchase of property and equipment (45) (18)
Net cash from (used in) investing activities (739) 343
Cash flows from (used in) financing activities    
Proceeds from issuance of common stock 4 8
Dividends paid 0 (272)
Net cash from (used in) financing activities 4 (264)
Net increase (decrease) in cash and cash equivalents (618) 14
Cash and cash equivalents, beginning 1,505 1,102
Cash and cash equivalents, ending 887 1,116
Supplemental cash flow information    
Cash paid for income taxes 462 524
Supplemental disclosure of non-cash investment and financing activities    
Note payable issued to fund acquisition, net of discount 771 0
Contingent earn-out liability $ 472 $ 0