CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 13,675	$ 26,692	[1]
Accounts receivable, net	16,232	18,143	[1]
Inventories, net	17,575	16,075	[1]
Prepaid expenses and other receivables	2,206	3,622	[1]
Total current assets	49,688	64,532	[1]
Property, plant and equipment, net	83,027	68,355	[1]
Intangible assets, net	52,930	56,017	[1]
Goodwill	445	471	[1]
Other assets	577	611	[1]
Total assets	186,667	189,986	[1]
Current liabilities:
Accounts payable	8,654	10,595	[1]
Accrued expenses	9,269	13,502	[1]
Total current liabilities	17,923	24,097	[1]
2021 Term Loan, net of debt discount and debt issuance costs (face of $15,000 as of June 30, 2018)	14,198	0
Convertible 3.75% Senior Notes, net of debt discount and debt issuance costs (face of $68,660 and $143,750 as of June 30, 2018 and December 31, 2017, respectively)	60,312	120,977	[1]
Convertible 4.75% Senior Notes, net of debt discount and debt issuance costs (face of $75,090 as of June 30, 2018)	54,963	0
Deferred tax liability	148	159	[1]
Total liabilities	147,544	145,233	[1]
Commitments and Contingencies			[1]
Stockholders’ equity:
Common stock, $0.01 par value, 100,000,000 shares authorized; 53,512,888 and 53,400,281 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively	554	554	[1]
Additional paid-in capital	126,532	106,312	[1]
Accumulated deficit	(85,612)	(60,094)	[1]
Accumulated other comprehensive loss	(2,351)	(2,019)	[1]
Total stockholders’ equity	39,123	44,753	[1]
Total liabilities and stockholders' equity	$ 186,667	$ 189,986	[1]

[1] Derived from the audited December 31, 2017 financial statement