Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 3,301	$ 2,997
Trade and other receivables, less allowance for doubtful accounts of $555 and $503	59,227	52,664
Contract assets	111,067	107,170
Inventories	62,708	59,651
Prepaid expenses and other	4,939	5,744
Total current assets	241,242	228,226
Property and equipment, less accumulated depreciation and amortization of $109,490 and $106,957	123,047	121,266
Operating lease right-of-use assets	97,085	98,507
Goodwill	53,684	53,684
Intangible assets, net	38,182	39,376
Other assets	6,281	6,620
Total assets	559,521	547,679
Current liabilities:
Accounts payable	36,953	32,267
Accrued liabilities	23,912	24,498
Contract liabilities	4,090	2,623
Current portion of operating lease liabilities	4,769	4,704
Total current liabilities	69,724	64,092
Borrowings on line of credit	90,252	86,761
Operating lease liabilities	92,539	93,725
Deferred income taxes	11,370	10,984
Other long-term liabilities	8,638	8,734
Total liabilities	272,523	264,296
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value, 15,000,000 shares authorized, 9,915,980 and 9,870,567 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	99	99
Additional paid-in-capital	125,403	125,062
Retained earnings	163,463	159,904
Accumulated other comprehensive loss	(1,967)	(1,682)
Total stockholders’ equity	286,998	283,383
Total liabilities and stockholders’ equity	$ 559,521	$ 547,679

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Balance Type:	credit
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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).