Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 8,825	$ 11,268
Trade accounts receivable, net	2,871	5,721
Inventories, net	14,450	11,466
Prepaid expenses and other current assets	1,792	2,401
Total current assets	27,938	30,856
Property, plant and equipment, net	4,134	2,729
Right-of-use (ROU) asset	2,558	0
Investment in securities	2,105	1,919
Deferred tax assets, net	3,911	3,495
Other assets	223	192
Total assets	40,869	39,191
Current liabilities:
Accounts payable	6,854	5,595
Accrued compensation and related taxes	1,160	2,014
Accrued warranty expense	1,390	1,546
Accrued other expenses and other current liabilities	512	292
Dividends payable	253	256
Short-term lease liability	263	0
Note payable-current portion	77	0
Deferred revenue	281	180
Total current liabilities	10,790	9,883
Note payable, net of current portion	348	0
Long-term lease liability	2,295	0
Deferred revenue	2,419	1,596
Total liabilities	15,852	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; 13,929,381 and 13,882,937 issued; and 12,672,056 and 12,817,829 outstanding shares at September 30, 2019 and December 31, 2018, respectively	8,357	8,330
Additional paid-in capital	26,037	25,867
Accumulated deficit	(4,482)	(2,393)
Treasury stock, at cost, 1,257,325 and 1,065,108 shares at September 30, 2019 and December 31, 2018, respectively	(4,895)	(4,092)
Total stockholders' equity	25,017	27,712
Total liabilities and stockholders' equity	$ 40,869	$ 39,191