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Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 853 $ 963
Investments 7,749 7,756
Trade receivables, less allowance for doubtful accounts of $11 1,044 902
Inventories 1,604 1,552
Other current assets 171 141
Income tax receivable 17 45
Total current assets 11,438 11,359
Deferred income tax asset, net 178 182
Intangible assets, net 624 800
Property and equipment, net 1,041 1,074
Total assets 13,281 13,415
Current liabilities    
Contingent earn-out 0 150
Accounts payable 193 178
Accrued expenses 425 380
Total current liabilities 618 708
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 2,011 2,004
Retained earnings 10,287 10,352
Accumulated other comprehensive gain (unrealized gain on available-for-sale securities, net of income tax) 26 12
Total stockholders' equity 12,663 12,707
Total liabilities and stockholders' equity $ 13,281 $ 13,415