Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 6,677	$ 43,646
Trade and other receivables, less allowance for doubtful accounts of $660 and $477	34,394	28,990
Contract assets	74,271	44,502
Inventories	39,376	17,055
Prepaid expenses and other	4,795	6,562
Total current assets	159,513	140,755
Property and equipment, net	103,447	78,756
Other assets	8,390	10,813
Total assets	271,350	230,324
Current liabilities:
Accounts payable	19,784	7,521
Accrued liabilities	7,547	6,563
Contract liabilities	3,745	2,599
Current portion of capital lease obligations	416	318
Total current liabilities	31,492	17,001
Borrowings on line of credit	11,464
Capital lease obligations, less current portion	839	737
Deferred income taxes	68	941
Other long-term liabilities	8,897	11,381
Total liabilities	52,760	30,060
Commitments and contingencies (Note 15)
Stockholders’ equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued or outstanding
Common stock, $.01 par value, 15,000,000 shares authorized, 9,735,055 and 9,619,755 shares issued and outstanding	97	96
Additional paid-in-capital	118,835	119,856
Retained earnings	101,194	81,757
Accumulated other comprehensive loss	(1,536)	(1,445)
Total stockholders’ equity	218,590	200,264
Total liabilities and stockholders’ equity	$ 271,350	$ 230,324