Condensed Consolidated Balance Sheet (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 5,581	$ 5,476
Available for sale securities	3,816	3,181
Trade receivables, less allowance for doubtful accounts of $17 and $9, respectively	699	731
Inventories	1,223	1,228
Income tax receivable	0	17
Other current assets	135	116
Total current assets	11,454	10,749
Property and equipment, net	1,184	1,179
Total assets	12,638	11,928
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	174	110
Accrued expenses	257	214
Accrued income tax	18	0
Total current liabilities	449	324
Deferred income tax liability	1,470	1,225
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; issued and outstanding: 3,390,785 and 3,389,577 shares, respectively	339	339
Additional paid-in capital	1,565	1,561
Retained earnings	6,513	6,570
Accumulated other comprehensive income (unrealized gain on available for sale securities, net of income tax)	2,302	1,909
Total stockholders' equity	10,719	10,379
Total liabilities and stockholders' equity	$ 12,638	$ 11,928