Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 74,340	$ 139,496
Restricted cash	56,804	54,813
Accounts receivable	24,437	25,448
Inventory	92,972	72,391
Prepaid expenses and other current assets	28,500	21,192
Total current assets	277,053	313,340
Restricted cash	176,070	175,191
Property, plant, and equipment, net of accumulated depreciation of $18,292 and $17,417, respectively	16,591	14,959
Leased property, net	252,802	244,740
Goodwill	8,673	8,842
Intangible assets, net	5,296	5,539
Other assets	12,059	8,573
Total assets	748,544	771,184
Current liabilities:
Accounts payable	35,503	40,376
Accrued expenses	14,273	14,213
Deferred revenue	11,557	11,691
Finance obligations	52,047	49,507
Current portion of long-term debt	27,819	26,461
Other current liabilities	10,423	8,543
Total current liabilities	151,622	150,791
Deferred revenue	22,912	23,369
Finance obligations	272,171	265,228
Convertible senior notes, net	112,878	110,246
Long-term debt	79,119	85,708
Other liabilities	13	13
Total liabilities	638,715	635,355
Stockholders' equity:
Common stock, $0.01 par value per share; 750,000,000 shares authorized; Issued (including shares in treasury): 322,220,469 at March 31, 2020 and 318,637,560 at December 31, 2019	3,222	3,186
Additional paid-in capital	1,519,257	1,507,116
Accumulated other comprehensive income	1,164	1,400
Accumulated deficit	(1,383,299)	(1,345,807)
Less common stock in treasury: 15,261,007 at March 31, 2020 and 15,259,045 at December 31, 2019	(31,224)	(31,216)
Total stockholders ' equity	109,120	134,679
Total liabilities, redeemable preferred stock, and stockholders ' equity	748,544	771,184
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		$ 441