Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 3,543	$ 2,997
Trade and other receivables, less allowance for doubtful accounts of $421 and $503	63,047	52,664
Contract assets	125,158	107,170
Inventories	74,247	59,651
Prepaid expenses and other	3,837	5,744
Total current assets	269,832	228,226
Property and equipment, less accumulated depreciation and amortization of $112,485 and $106,957	124,651	121,266
Operating lease right-of-use assets	95,628	98,507
Goodwill	53,684	53,684
Intangible assets, net	37,073	39,376
Other assets	5,715	6,620
Total assets	586,583	547,679
Current liabilities:
Accounts payable	49,640	32,267
Accrued liabilities	29,240	24,498
Contract liabilities	8,127	2,623
Current portion of operating lease liabilities	4,769	4,704
Total current liabilities	91,776	64,092
Borrowings on line of credit	86,713	86,761
Operating lease liabilities	91,374	93,725
Deferred income taxes	11,285	10,984
Other long-term liabilities	8,491	8,734
Total liabilities	289,639	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, 9,927,360 and 9,870,567 shares issued and outstanding as of June 30, 2022 and December 31, 2021, respectively	99	99
Additional paid-in-capital	125,517	125,062
Retained earnings	173,136	159,904
Accumulated other comprehensive loss	(1,808)	(1,682)
Total stockholders’ equity	296,944	283,383
Total liabilities and stockholders’ equity	$ 586,583	$ 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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- 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).