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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Cash flows from (used in) operating activities    
Net income $ 400 $ 166
Adjustments to reconcile net income to net cash from (used in) operating activities:    
Depreciation 33 27
Gain on sale of available-for-sale securities (547) (103)
Deferred income taxes 10 40
Interest accrued on investments (1) (2)
Stock-based compensation expense 14 0
Change in allowance for doubtful accounts 2 (2)
Changes in:    
Trade receivables (132) (98)
Inventories 37 7
Current assets, other (13) (61)
Accounts payable 61 28
Accrued expenses 73 47
Accrued income taxes 200 (289)
Net cash from (used in) operating activities 137 (240)
Cash flows from (used in) investing activities    
Proceeds from sale of available-for-sale securities 554 104
Purchase of treasury bills (1,933) 0
Proceeds from the maturity of treasury bills 1,828 0
Cash paid for acquisition (400) 0
Purchase of property and equipment (13) (11)
Net cash from investing activities 36 93
Cash flows from (used in) financing activities    
Proceeds from issuance of common stock 4 6
Dividends paid 0 (136)
Net cash from (used in) financing activities 4 (130)
Net increase (decrease) in cash and cash equivalents 177 (277)
Cash and cash equivalents, beginning 1,505 1,102
Cash and cash equivalents, ending 1,682 825
Supplemental cash flow information    
Cash paid for income taxes 5 272
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