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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Cash flows from (used in) operating activities    
Net income $ 602 $ 436
Adjustments to reconcile net income to net cash from (used in) operating activities:    
Depreciation and amortization 67 54
Gain on sale of available-for-sale securities (750) (401)
Deferred income taxes (20) 23
Interest accrued on investments (2) (1)
Stock-based compensation expense 36 0
Loss on disposal of property and equipment 1 0
Change in allowance for doubtful accounts 0 (2)
Change in, net of acquisition:    
Trade receivables (71) (150)
Inventories (63) 8
Current assets, other 29 (35)
Accounts payable 102 (4)
Accrued expenses 62 38
Accrued income taxes 97 (249)
Net cash from (used in) operating activities 90 (283)
Cash flows from (used in) investing activities    
Proceeds from sale of available-for-sale securities 759 405
Purchase of treasury bills (5,333) (5,426)
Proceeds from the maturity of treasury bills 4,228 5,251
Cash paid for acquisition (400) 0
Purchase of property and equipment (16) (12)
Net cash from (used in) investing activities (762) 218
Cash flows from (used in) financing activities    
Proceeds from issuance of common stock 4 6
Dividends paid 0 (272)
Net cash from (used in) financing activities 4 (266)
Net decrease in cash and cash equivalents (668) (331)
Cash and cash equivalents, beginning 1,505 1,102
Cash and cash equivalents, ending 837 771
Supplemental cash flow information    
Cash paid for income taxes 252 394
Cash paid for interest 0 0
Supplemental disclosure of non-cash investment and financing activities    
Note payable issued to fund acquisition, net of discount 771 0
Contingent consideration recorded in connection with the acquisition $ 472 $ 0