CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 6,707	$ 9,705
Restricted cash	206	2,892
Accounts receivable, net of allowance for doubtful accounts of $2,539 and $2,636, as of September 30, 2019 and December 31, 2018, respectively	20,361	16,120
Inventories	22,633	16,296
Prepaid expenses and other receivables	1,670	3,373
Total current assets	51,577	48,386
Property, plant and equipment, net	96,088	91,775
Intangible assets, net	44,287	48,375
Goodwill	484	470
Other assets	3,757	1,886
Total assets	196,193	190,892
Current liabilities:
Accounts payable	8,822	5,933
Accrued expenses	10,438	9,842
Deferred income	0	2,426
Revolver, current portion	2,500	0
Convertible 3.75% Senior Notes, net of debt discount and debt issuance costs (face of $0 and $15,702 as of June 30, 2019 and December 31, 2018, respectively)	12,777	14,411
Other current liabilities	434	0
Total current liabilities	34,971	32,612
Convertible 4.75% Senior Notes, net of debt discount and debt issuance costs (face of $75,090 as of June 30, 2019 and December 31, 2018, respectively)	59,434	56,909
Revolver, net of debt issuance costs (face of $0 and $15,000 as of June 30, 2019 and December 31, 2018, respectively)	25,000	15,000
2023 Term Loans, net of debt issuance costs (face of $0 and $70,000 as of June 30, 2019 and December 31, 2018, respectively)	74,353	67,662
Deferred tax liability	223	215
Other long term liabilities	2,367	73
Total liabilities	196,348	172,471
Commitments and Contingencies
Stockholders’ equity/ (deficit):
Common stock, $0.01 par value, 100,000,000 shares authorized; 0 and 53,774,221 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively	558	557
Additional paid-in capital	117,782	116,864
Accumulated deficit	(116,176)	(96,350)
Accumulated other comprehensive loss	(2,319)	(2,650)
Total stockholders’ equity / (deficit)	(155)	18,421
Total liabilities and stockholders' equity/ (deficit)	$ 196,193	$ 190,892