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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Current Assets:    
Cash and cash equivalents $ 68,431 $ 72,289
Accounts receivable, net of allowance for doubtful accounts of $1,232 and $1,171, respectively 69,070 76,092
Inventories 104,313 107,276
Unbilled receivables 13,597 16,318
Other current assets 9,494 11,206
Total current assets 264,905 283,181
Property, plant and equipment, net 40,861 41,943
Right-of-use assets 17,466 18,504
Intangible assets, net 70,215 72,364
Goodwill 22,219 21,993
Deferred income taxes 4,489 3,731
Other assets 25,493 27,201
Total assets 445,648 468,917
Current Liabilities:    
Accounts payable 38,800 44,169
Accrued expenses 24,104 26,918
Current portion of long-term debt 817 5,489
Operating lease liability, current 6,403 7,377
Other current liabilities 6,832 6,265
Total current liabilities 76,956 90,218
Long-term Liabilities:    
Long-term debt 134,258 138,215
Operating lease liability, long-term 11,329 11,751
Liability for uncertain tax positions 26,864 26,901
Minimum pension obligation and unfunded pension liability 21,745 21,545
Deferred income taxes 1,239 1,726
Other liabilities 11,425 10,510
Total liabilities 283,816 300,866
Commitments and contingencies
Stockholders' Equity:    
Preferred stock, no par value, 1,000,000 shares authorized; none issued
Additional paid-in capital 34,430 33,826
Retained earnings 152,420 157,063
Accumulated other comprehensive loss (26,244) (24,065)
Total stockholders' equity 161,832 168,051
Total liabilities and stockholders' equity 445,648 468,917
Common Class A [Member]    
Stockholders' Equity:    
Common stock 214 214
Common Class B [Member]    
Stockholders' Equity:    
Common stock $ 1,012 $ 1,013