Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 2,359	$ 1,190
Treasury bills	6,142	6,542
Available-for-sale securities	0	1,256
Trade receivables, less allowance for doubtful accounts of $8 and $10, respectively	1,008	738
Inventories	1,458	1,224
Other current assets	130	163
Total current assets	11,097	11,113
Deferred income tax asset	91	0
Intangible assets, net	1,388	1,505
Property and equipment, net	1,101	1,146
Total assets	13,677	13,764
Current liabilities
Current maturities of note payable	390	381
Accounts payable current	277	126
Accrued expenses current	432	392
Accrued income tax	280	82
Total current liabilities	1,379	981
Long-term liabilities
Note payable - long term	0	390
Contingent earn-out	455	472
Deferred income tax liability	0	391
Total long-term liabilities	$ 455	$ 1,253
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,395,521 shares issued and outstanding	$ 339	$ 339
Additional paid-in capital	1,847	1,816
Retained earnings	9,690	8,641
Accumulated other comprehensive income (loss) (unrealized gain (loss) on available-for-sale securities, net of income tax)	(33)	734
Total stockholders' equity	11,843	11,530
Total liabilities and stockholders' equity	$ 13,677	$ 13,764