Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 3,949	$ 7,302
Restricted cash	1,329	656
Accounts receivable, net of allowance for doubtful accounts of $1.4 million and $1.6 million at March 31, 2019 and December 31, 2018, respectively	28,689	31,392
Inventories	3,352	3,358
Prepaid expenses and other receivables	3,539	2,435
Other current assets	283	1,582
Assets held for sale	4,604	2,782
Total current assets	45,745	49,507
Property, plant and equipment, net of accumulated depreciation of $75.1 million and $73.6 million at March 31, 2019 and December 31, 2018, respectively	208,520	215,640
Operating lease assets	4,103	0
Equity investments	38	41
Intangibles, net	997	1,112
Goodwill	29,518	29,518
Other assets	130	118
Total assets	289,051	295,936
Liabilities and Shareholders’ Equity
Accounts payable	5,980	9,061
Accrued and other current liabilities	14,733	16,670
Current portion of long-term debt	6,450	38,305
Current contingent consideration	500	500
Derivative warrant liability	75	34
Total current liabilities	27,738	64,570
Long-term debt	29,656	27,628
Noncurrent operating lease liabilities	2,180	0
Deferred income taxes	251	181
Other long-term liabilities	7,323	7,130
Total liabilities	67,148	99,509
Commitments and contingencies
Shareholders’ equity:
Common stock	157	122
Additional paid-in capital	336,455	303,463
Treasury stock	(373)	0
Accumulated deficit	(114,336)	(107,158)
Total shareholders’ equity	221,903	196,427
Total liabilities and shareholders’ equity	$ 289,051	$ 295,936