Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 37,927	$ 31,014
Trade and other receivables, less allowance for doubtful accounts of $767 and $801	42,680	38,026
Contract assets	76,985	91,186
Inventories	29,177	30,654
Prepaid expenses and other	5,194	4,159
Total current assets	191,963	195,039
Property and equipment, net	110,184	99,631
Operating Lease, Right-of-Use Asset	30,813	7,683
Goodwill	22,985	0
Intangible assets, net	10,518	1,231
Other assets	6,552	6,661
Total assets	373,015	310,245
Current liabilities:
Current portion of long-term debt	7,701	0
Accounts payable	12,993	15,493
Accrued liabilities	16,814	12,150
Contract liabilities	6,189	12,281
Current portion of operating lease liabilities	2,204	1,642
Total current liabilities	45,901	41,566
Long-term debt	5,888	0
Long-term lease liabilities, operating leases	27,911	6,247
Deferred income taxes	12,481	4,265
Other long-term liabilities	11,208	10,009
Total liabilities	103,389	62,087
Commitments and contingencies (Note 14)
Stockholders’ equity:
Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value, 15,000,000 shares authorized, 9,805,437 and 9,746,979 shares issued and outstanding	98	97
Additional paid-in-capital	123,013	120,544
Retained earnings	148,381	129,331
Accumulated other comprehensive loss	(1,866)	(1,814)
Total stockholders’ equity	269,626	248,158
Total liabilities and stockholders’ equity	$ 373,015	$ 310,245

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).