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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current Assets:    
Cash and cash equivalents $ 61,961 $ 84,939
Accounts receivable, net of allowance for doubtful accounts of $1,003 and $1,036, respectively 86,031 71,372
Inventories 128,179 100,133
Unbilled receivables 28,093 14,135
Assets held for sale 1,626 0
Other current assets 9,655 9,637
Total current assets 315,545 280,216
Property, plant and equipment, net 35,553 34,501
Right-of-use assets 11,314 14,217
Intangible assets, net 62,698 65,789
Goodwill 25,846 23,966
Deferred income taxes 5,671 5,705
Other assets 30,956 29,472
Total assets 487,583 453,866
Current Liabilities:    
Accounts payable 57,610 39,774
Accrued expenses 38,249 28,476
Current portion of long-term debt 0 5,286
Operating lease liabilities, current 5,623 6,591
Other current liabilities 4,754 7,409
Total current liabilities 106,236 87,536
Long-term Liabilities:    
Long-term debt 112,500 110,294
Operating lease liabilities, long-term 5,944 8,064
Liability for uncertain tax positions 27,565 26,089
Minimum pension obligation and unfunded pension liability 25,193 24,620
Deferred income taxes 938 1,030
Other liabilities 9,005 10,434
Total liabilities 287,381 268,067
Commitments and contingencies (see Note 13)
Stockholders' Equity:    
Preferred stock, no par value, 1,000,000 shares authorized; none issued 0 0
Additional paid-in capital 37,883 36,136
Retained earnings 180,769 166,491
Accumulated other comprehensive loss (19,690) (18,063)
Total stockholders' equity 200,202 185,799
Total liabilities and stockholders' equity 487,583 453,866
Common Class A [Member]    
Stockholders' Equity:    
Common stock 214 214
Common Class B [Member]    
Stockholders' Equity:    
Common stock $ 1,026 $ 1,021