Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 7,540	$ 11,268
Trade accounts receivable, net	5,045	5,721
Inventories, net	12,162	11,466
Prepaid expenses and other current assets	2,544	2,401
Total current assets	27,291	30,856
Property, plant and equipment, net	3,302	2,729
Right-of-use (ROU) asset	2,746	0
Investment in securities	2,511	1,919
Deferred tax assets, net	3,850	3,495
Other assets	191	192
Total assets	39,891	39,191
Current liabilities:
Accounts payable	6,197	5,595
Accrued compensation and related taxes	1,063	2,014
Accrued warranty expense	1,458	1,546
Accrued other expenses and other current liabilities	224	292
Dividends payable	254	256
Short-term lease liability	291	0
Deferred revenue	184	180
Total current liabilities	9,671	9,883
Long-term lease liability	2,455	0
Deferred revenue	1,888	1,596
Total liabilities	14,014	11,479
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; 13,883,937 and 13,882,937 issued; and 12,740,894 and 12,817,829 outstanding shares at March 31, 2019 and December 31, 2018, respectively	8,330	8,330
Additional paid-in capital	25,941	25,867
Accumulated deficit	(3,965)	(2,393)
Treasury stock, at cost, 1,143,043 and 1,065,108 shares at March 31, 2019 and December 31, 2018, respectively	(4,429)	(4,092)
Total stockholders' equity	25,877	27,712
Total liabilities and stockholders' equity	$ 39,891	$ 39,191