Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 43,275	$ 38,602
Restricted cash	35,720	17,399
Accounts receivable	24,392	37,347
Inventory	80,601	47,910
Prepaid expenses and other current assets	12,804	14,357
Total current assets	196,792	155,615
Restricted cash	119,322	54,152
Property, plant, and equipment, net of accumulated depreciation of $16,477 and $14,403, respectively	14,990	12,869
Leased property, net	202,034	146,751
Goodwill	8,606	9,023
Intangible assets, net	5,113	3,890
Other assets	9,152	8,026
Total assets	556,009	390,326
Current liabilities:
Accounts payable	36,851	34,824
Accrued expenses	9,457	7,864
Deferred revenue	11,480	12,055
Finance obligations	41,112	74,264
Current portion of long-term debt	17,202	16,803
Other current liabilities	10,238	560
Total current liabilities	126,340	146,370
Deferred revenue	22,444	28,021
Common stock warrant liability	98	105
Finance obligations	208,465	118,076
Convertible senior notes, net	107,760	63,247
Long-term debt	78,840	133
Other liabilities	13	18
Total liabilities	543,960	355,970
Stockholders' (deficit) equity:
Common stock, $0.01 par value per share; 750,000,000 shares authorized; Issued (including shares in treasury): 253,982,578 at September 30, 2019 and 234,160,661 at December 31, 2018	2,540	2,342
Additional paid-in capital	1,347,398	1,289,714
Accumulated other comprehensive income	929	1,584
Accumulated deficit	(1,334,057)	(1,260,290)
Less common stock in treasury: 15,259,045 at September 30, 2019 and 15,002,663 at December 31, 2018	(31,216)	(30,637)
Total stockholders' (deficit) equity	(14,406)	2,713
Total liabilities, redeemable preferred stock, and stockholders' (deficit) equity	556,009	390,326
Series C Redeemable Convertible Preferred Stock
Redeemable preferred stock:
Redeemable preferred stock	709	709
Series E Redeemable Convertible Preferred Stock
Redeemable preferred stock:
Redeemable preferred stock	$ 25,746	$ 30,934