Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 41,887	$ 43,646
Trade and other receivables, less allowance for doubtful accounts of $286 and $477	16,334	28,990
Contract assets	44,320	44,502
Inventories	19,270	17,055
Prepaid expenses and other	5,300	6,562
Assets held for sale	3,088
Total current assets	130,199	140,755
Property and equipment, less accumulated depreciation and amortization of $75,408 and $74,311	74,430	78,756
Other assets	9,300	10,813
Total assets	213,929	230,324
Current liabilities:
Accounts payable	5,568	7,521
Accrued liabilities	5,013	6,563
Contract liabilities	184	2,599
Current portion of capital lease obligations	400	318
Total current liabilities	11,165	17,001
Capital lease obligations, less current portion	920	737
Deferred income taxes	233	941
Other long-term liabilities	10,783	11,381
Total liabilities	23,101	30,060
Commitments and contingencies (Note 8)
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	73,245	81,757
Accumulated other comprehensive loss	(1,349)	(1,445)
Total stockholders’ equity	190,828	200,264
Total liabilities and stockholders’ equity	$ 213,929	$ 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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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).