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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash flows from operating activities:    
Net income $ 3,559 $ 2,175
Depreciation and finance lease amortization 2,935 2,698
Amortization of intangible assets 1,194 316
Deferred income taxes 383 271
Share-based compensation expense 635 697
Other, net 117 (68)
Trade and other receivables (6,640) 2,308
Contract assets, net (2,430) (2,636)
Inventories (3,057) (3,988)
Prepaid expenses and other assets 2,507 1,203
Accounts payable 4,616 165
Accrued and other liabilities (2,171) (3,727)
Net cash provided by (used in) operating activities 1,648 (586)
Cash flows from investing activities:    
Purchases of property and equipment (4,440) (1,861)
Other investing activities 30 99
Net cash used in investing activities (4,410) (1,762)
Cash flows from financing activities:    
Borrowings on line of credit 38,023 0
Repayments on line of credit (34,532) 0
Payments on long-term debt 0 (5,364)
Payments on finance lease obligations (125) (100)
Tax withholdings related to net share settlements of equity awards (294) (222)
Other financing activities (6) 0
Net cash provided by (used in) financing activities 3,066 (5,686)
Change in cash and cash equivalents 304 (8,034)
Cash and cash equivalents, beginning of period 2,997 37,927
Cash and cash equivalents, end of period 3,301 29,893
Noncash investing and financing activities:    
Accrued property and equipment purchases 857 428
Right-of-use assets obtained in exchange for operating lease liabilities 26 4,656
Right-of-use assets obtained in exchange for finance lease liabilities $ 338 $ 0