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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Cash flows from (used in) operating activities    
Net income $ 706 $ 1,086
Adjustments to reconcile net income to net cash from operating activities:    
Depreciation 110 71
Realized gain on sale of available-for-sale securities (530) (794)
Deferred income taxes (71) 38
Interest accrued on investments (5) 1
Stock compensation expense 162 6
Change in allowance for doubtful accounts (2) 1
Changes in:    
Trade receivables (142) 57
Inventories 270 (102)
Current assets, other (60) 41
Accounts payable (35) (16)
Accrued expenses 38 13
Accrued income taxes (314) 330
Net cash from operating activities 127 732
Cash flows from (used in) investing activities    
Proceeds from sale of available-for-sale securities 536 874
Purchase of treasury bills (6,425) (5,249)
Proceeds from the maturity of treasury bills 6,451 0
Purchase of property and equipment (23) (196)
Net cash from (used in) investing activities 539 (4,571)
Cash flows from (used in) financing activities    
Proceeds from issuance of common stock 9 8
Dividends paid (272) (543)
Net cash used in financing activities (263) (535)
Net increase (decrease) in cash and cash equivalents 403 (4,374)
Cash and cash equivalents, beginning 1,102 5,476
Cash and cash equivalents, ending 1,505 1,102
Supplemental cash flow information    
Cash paid during the year for income taxes $ 617 $ 207