Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 8,938	$ 10,910
Available-for-sale-securities	1,180	0
Trade accounts receivable, net	7,032	3,448
Inventories, net	15,235	13,999
Prepaid expenses and other current assets	843	1,410
Total current assets	33,228	29,767
Property, plant and equipment, net	2,347	2,486
Available-for-sale securities	8,573	6,472
Deferred tax assets, net	1,701	3,418
Other assets	307	401
Total assets	46,156	42,544
Current liabilities:
Accounts payable	5,776	1,973
Accrued compensation and related taxes	1,250	2,193
Accrued warranty expense	1,195	650
Accrued other expenses and other current liabilities	120	169
Dividends payable	274	1,235
Deferred revenue	150	142
Total current liabilities	8,765	6,362
Deferred revenue	452	408
Total liabilities	9,217	6,770
Commitments and contingencies
Stockholders' equity:
Preferred stock; $1.00 par value; 1,000,000 authorized shares; none issued or outstanding.	0	0
Common stock; $.60 par value; 20,000,000 authorized shares; 13,844,584 and 13,754,749 issued and outstanding shares at September 30, 2017 and December 31, 2016, respectively	8,307	8,253
Additional paid-in capital	25,586	25,382
Accumulated (deficit) earnings	(901)	240
Accumulated other comprehensive income	4,514	2,061
Treasury stock, at cost, 127,010 and 30,422 at September 30, 2017 and December 31, 2016, respectively	(567)	(162)
Total stockholders' equity	36,939	35,774
Total liabilities and stockholders' equity	$ 46,156	$ 42,544