Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 43,646	$ 21,829
Trade and other receivables, less allowance for doubtful accounts of $477 and $515	28,990	25,555
Costs and estimated earnings in excess of billings on uncompleted contracts	44,502	43,663
Inventories	17,055	18,645
Prepaid expenses and other	6,562	2,096
Assets held for sale		36,822
Total current assets	140,755	148,610
Property and equipment, net	78,756	81,671
Other assets	10,813	11,274
Total assets	230,324	241,555
Current liabilities:
Accounts payable	7,521	5,267
Accrued liabilities	6,563	10,925
Billings in excess of costs and estimated earnings on uncompleted contracts	2,599	2,038
Current portion of capital lease obligations	318	325
Total current liabilities	17,001	18,555
Capital lease obligations, less current portion	737	602
Deferred income taxes	941	1,282
Other long-term liabilities	11,381	11,903
Total liabilities	30,060	32,342
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, 9,619,755 and 9,601,011 shares issued and outstanding	96	96
Additional paid-in-capital	119,856	118,680
Retained earnings	81,757	91,920
Accumulated other comprehensive loss	(1,445)	(1,483)
Total stockholders’ equity	200,264	209,213
Total liabilities and stockholders’ equity	$ 230,324	$ 241,555

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).