Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (52)	$ 1,847
Adjustments to reconcile net (loss) income to cash provided by (used in) operating activities:
Depreciation and amortization	1,504	1,413
Provision for doubtful accounts	8	10
Stock-based compensation expense	295	367
Noncash operating lease expense	1,002	882
Amortization of debt issuance costs	540	184
Deferred income tax (benefit) provision	1,021	616
Gain on sale of property and equipment	(29)	(12)
Gain on change in fair value of warrant liability	(161)	0
Changes in operating assets and liabilities:
Accounts receivable	(7,333)	4,027
Contract assets	7,518	(2,074)
Other current assets	(320)	29,803
Other assets	0	(913)
Accounts payable, including retainage	(5,771)	(3,641)
Prepaid income taxes	(1,518)	428
Accrued taxes payable	(11)	137
Contract liabilities	6,038	(6,521)
Operating lease liabilities	(978)	(879)
Accrued expenses and other current liabilities	1,407	(29,668)
Other long-term liabilities	357	(138)
Net cash provided by (used in) operating activities	3,517	(4,132)
Cash flows from investing activities:
Proceeds from sale of property and equipment	36	13
Advances to joint ventures	(3)	0
Purchase of property and equipment	(501)	(584)
Net cash used in investing activities	(468)	(571)
Cash flows from financing activities:
Increase in bank overdrafts	0	(1,333)
Payments on Credit Agreement term loan	0	(900)
Proceeds from Credit Agreement revolver	0	17,500
Payments on Credit Agreement revolver	0	(7,000)
Proceeds from 2019 Revolving Credit Facility	7,250	0
Payments on 2019 Revolving Credit Facility	(7,250)	0
Payments on Bridge Term Loan	0	(250)
Payments on finance leases	(652)	(550)
Payments of debt issuance costs	0	(550)
Taxes paid related to net-share settlement of equity awards	(44)	(29)
Net cash (used in) provided by financing activities	(696)	6,888
Increase in cash, cash equivalents and restricted cash	2,353	2,185
Cash, cash equivalents and restricted cash, beginning of period	8,457	1,732
Cash, cash equivalents and restricted cash, end of period	10,810	3,917
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	0	1,509
Right of use assets obtained in exchange for new finance lease liabilities	337	706
Right-of-use assets disposed or adjusted modifying operating leases liabilities	344	0
Right-of-use assets disposed or adjusted modifying finance leases liabilities	(41)	0
Interest paid	$ 1,607	$ 596