CONSOLIDATED BALANCE SHEETS (in thousands, except share data) (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 16,816	$ 18,541
Trade accounts receivable, net of allowance for doubtful accounts of $83 and $73, respectively	4,423	3,769
Inventories	3,959	4,168
Other current assets	435	708
TOTAL CURRENT ASSETS	25,633	27,186
Property, plant and equipment - net	2,419	2,458
Income tax receivable	598	598
Other assets	220	45
TOTAL ASSETS	28,870	30,287
CURRENT LIABILITIES:
Accounts payable	1,369	1,301
Accrued compensation	1,540	3,536
Deferred revenue	1,718	1,787
Other accrued liabilities	934	858
Income taxes payable	174	218
TOTAL CURRENT LIABILITIES	5,735	7,700
Long-term other payables	472	527
COMMITMENTS	0	0
STOCKHOLDERS' EQUITY
Preferred stock - Authorized, 5,000,000 shares, including 200,000 shares of Series A Junior Participating Issued and outstanding, none	0	0
Common stock, at stated value - Authorized, 30,000,000 shares Issued and outstanding, 8,295,026 shares as of March 31, 2018 and 8,276,813 shares as of December 31, 2017	19,161	18,989
Accumulated earnings (deficit)	2,219	2,089
Accumulated other comprehensive income	1,283	982
TOTAL STOCKHOLDERS' EQUITY	22,663	22,060
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 28,870	$ 30,287