CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 30,352	$ 39,457
Restricted cash	4,950	4,950
Receivables, less allowance for doubtful accounts of $37,912 as of December 31, 2017	88,185	85,522
Inventory	41,549	38,044
Deferred taxes	1,066	1,098
Prepaid expenses and other current assets	9,848	18,620
Total current assets	175,950	187,691
Property and equipment, net	24,971	26,973
Goodwill	367,198	367,198
Intangible assets, net	16,681	19,114
Other non-current assets	2,082	2,116
Total assets	586,882	603,092
Current liabilities
Current portion of long-term debt	1,055	1,722
Accounts payable	68,835	65,963
Amounts due to plan sponsors	3,652	4,621
Accrued interest	2,219	6,706
Accrued expenses and other current liabilities	27,933	26,118
Total current liabilities	103,694	105,130
Long-term debt, net of current portion	480,382	478,866
Other non-current liabilities	18,282	21,769
Total liabilities	602,358	605,765
Stockholders’ deficit
Preferred stock, $.0001 par value; 5,000,000 shares authorized; no shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	0	0
Common stock, $.0001 par value; 250,000,000 shares authorized; 127,793,785 and 127,634,012 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	13	13
Treasury stock, 96,467 and 5,106 shares outstanding, at cost, as of March 31, 2018 and December 31, 2017	(354)	(16)
Additional paid-in capital	622,657	624,762
Accumulated deficit	(722,528)	(709,511)
Total stockholders’ deficit	(100,212)	(84,752)
Total liabilities and stockholders’ deficit	586,882	603,092
Series A convertible preferred stock, $.0001 par value; 825,000 shares authorized; 21,643 and 21,645 shares issued and outstanding as of March 31, 2018 and December 31, 2017, respectively; and $2,998 and $2,916 liquidation preference as of March 31, 2018 and December 31, 2017, respectively
Current liabilities
Convertible preferred stock	2,923	2,827
Series C convertible preferred stock, $.0001 par value; 625,000 shares authorized; 614,177 shares issued and outstanding as of March 31, 2018 and December 31, 2017; and $86,952 and $84,555 liquidation preference as of March 31, 2018 and December 31, 2017, respectively
Current liabilities
Convertible preferred stock	$ 81,813	$ 79,252