Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 3,857	$ 4,167
Accounts receivable, less allowance of $1,179 in 2021 and $1,152 in 2020	31,592	27,173
Inventories	49,389	50,704
Prepaid expenses and other current assets	2,477	1,641
Total current assets	87,315	83,685
Property, plant and equipment:
Land	1,766	1,770
Buildings	13,494	12,899
Machinery and equipment	25,571	24,524
Total property, plant and equipment	40,831	39,193
Less: accumulated depreciation	19,693	18,954
Net property, plant and equipment	21,138	20,239
Operating lease right-of-use asset, net	3,700	2,422
Goodwill	4,800	4,800
Intangible assets, less accumulated amortization	18,361	18,721
Total assets	135,314	129,868
Current liabilities:
Accounts payable	8,151	7,601
Operating lease liability - current portion	932	873
Current portion of mortgage payable	267	267
Other accrued liabilities	11,323	11,460
Total current liabilities	20,673	20,201
Long-term debt	40,626	38,767
Mortgage payable, net of current portion	2,844	2,911
Operating lease liability - non-current portion	2,926	1,654
Other non-current liabilities	110	110
Total liabilities	70,687	67,151
Commitments and Contingencies (see note 2)
STOCKHOLDERS' EQUITY
Common stock, par value $2.50: authorized 8,000,000 shares; issued - 4,840,571 shares in 2020 and 2019, including treasury stock	12,145	12,101
Additional paid-in capital	8,375	7,931
Retained earnings	59,643	58,033
Treasury stock, at cost - 1,501,658 shares in 2021 and 1,501,658 in 2020	(14,522)	(14,522)
Accumulated other comprehensive loss:
Translation adjustment	(1,014)	(826)
Total stockholders’ equity	64,627	62,717
Total liabilities and stockholders’ equity	135,314	129,868
PPP Loan
Current liabilities:
Long-term debt	$ 3,508	$ 3,508