Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,547	$ 43,646
Trade and other receivables, less allowance for doubtful accounts of $558 and $477	33,955	28,990
Contract assets	64,130	44,502
Inventories	34,742	17,055
Prepaid expenses and other	5,350	6,562
Total current assets	139,724	140,755
Property and equipment, less accumulated depreciation and amortization of $76,980 and $74,311	107,907	78,756
Other assets	9,593	10,813
Total assets	257,224	230,324
Current liabilities:
Accounts payable	19,291	7,521
Accrued liabilities	6,063	6,563
Contract liabilities	802	2,599
Current portion of capital lease obligations	430	318
Total current liabilities	26,586	17,001
Borrowings on line of credit	190
Capital lease obligations, less current portion	931	737
Deferred income taxes	67	941
Other long-term liabilities	10,814	11,381
Total liabilities	38,588	30,060
Commitments and contingencies (Note 9)
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	101,046	81,757
Accumulated other comprehensive loss	(1,342)	(1,445)
Total stockholders’ equity	218,636	200,264
Total liabilities and stockholders’ equity	$ 257,224	$ 230,324

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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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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).