Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,843	$ 6,677
Trade and other receivables, less allowance for doubtful accounts of $564 and $660	27,791	34,394
Contract assets	70,267	74,271
Inventories	41,116	39,376
Prepaid expenses and other	4,505	4,795
Total current assets	147,522	159,513
Property and equipment, less accumulated depreciation and amortization of $79,438 and $76,861	102,397	103,447
Other assets	16,606	8,390
Total assets	266,525	271,350
Current liabilities:
Accounts payable	15,524	19,784
Accrued liabilities	8,916	7,963
Contract liabilities	4,530	3,745
Total current liabilities	28,970	31,492
Borrowings on line of credit		11,464
Other long-term liabilities	16,767	9,804
Total liabilities	45,737	52,760
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 shares issued and outstanding	97	97
Additional paid-in-capital	118,857	118,835
Retained earnings	103,594	101,194
Accumulated other comprehensive loss	(1,760)	(1,536)
Total stockholders’ equity	220,788	218,590
Total liabilities and stockholders’ equity	$ 266,525	$ 271,350

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).