Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 10,911	$ 5,172
Accounts receivable, less allowance for doubtful accounts of $7,478 and $7,667, respectively	103,066	101,902
Accounts receivable - other	2,405	1,356
Inventories	87,774	89,766
Contract assets	40,662	39,231
Prepaid expenses and other current assets	11,508	11,030
Total current assets	256,326	248,457
Property, plant and equipment, net	42,077	36,644
Operating lease right-of-use assets	5,042	3,826
Deferred tax asset	810	0
Intangible assets, net	63,659	58,746
Goodwill	36,197	36,116
Other assets	10,912	10,135
Total assets	415,023	393,924
Current liabilities:
Accounts payable	35,429	39,327
Other current liabilities	34,519	44,670
Current portion of long-term debt	15,286	15,286
Current portion of acquisition-related contingent liabilities	5,791	5,589
Total current liabilities	91,025	104,872
Long-term debt	94,920	72,372
Long-term pension liability	14,423	14,574
Long-term acquisition-related contingent liabilities	2,879	1,892
Long-term operating lease liabilities	2,273	1,599
Deferred tax liability	0	450
Other long-term liabilities	8,120	6,535
Commitments and contingencies (Note 6)
Shareholders’ equity:
Preferred stock, $.001 par value - authorized 300,000 shares (none issued)	0	0
Common stock, $.001 par value - authorized 50,000,000 shares, issued and outstanding 15,582,835 and 15,391,660 shares, respectively.	15	15
Additional paid-in capital	62,773	61,844
Retained earnings	150,734	141,972
Accumulated other comprehensive income (loss), net of tax:
Pensions	(10,184)	(10,898)
Cash flow hedges	64	69
Foreign currency translation adjustment	(2,019)	(1,372)
Total shareholders’ equity	201,383	191,630
Total liabilities and shareholders’ equity	$ 415,023	$ 393,924