CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 40,533	$ 9,569
Restricted cash	5,055	0
Receivables, less allowance for doubtful accounts of $45,651 and $44,730 as of June 30, 2017 and December 31, 2016, respectively	103,089	111,811
Inventory	28,822	36,165
Prepaid expenses and other current assets	12,998	18,507
Total current assets	190,497	176,052
Property and equipment, net	30,063	32,535
Goodwill	365,947	365,947
Intangible assets, net	24,672	31,043
Other non-current assets	2,204	2,163
Total assets	613,383	607,740
Current liabilities
Current portion of long-term debt	1,731	18,521
Accounts payable	46,381	59,134
Amounts due to plan sponsors	4,825	3,799
Accrued interest	6,736	6,705
Accrued expenses and other current liabilities	43,209	42,191
Total current liabilities	102,882	130,350
Long-term debt, net of current portion	475,674	433,413
Deferred taxes	3,504	2,281
Other non-current liabilities	17,942	1,257
Total liabilities	600,002	567,301
Stockholders’ deficit
Preferred stock, $.0001 par value; 5,000,000 shares authorized; no shares issued and outstanding as of June 30, 2017 and December 31, 2016, respectively	0	0
Common stock, $.0001 par value; 250,000,000 shares authorized; 127,441,893 and 117,682,543 shares issued and outstanding as of June 30, 2017 and December 31, 2016, respectively	13	12
Additional paid-in capital	628,545	611,844
Accumulated deficit	(692,045)	(643,419)
Total stockholders’ deficit	(63,487)	(31,563)
Total liabilities and stockholders’ deficit	613,383	607,740
Series A convertible preferred stock, $.0001 par value; 825,000 shares authorized; 21,645 shares issued and outstanding as of June 30, 2017 and December 31, 2016; and $2,754 and $2,603 liquidation preference as of June 30, 2017 and December 31, 2016, respectively
Current liabilities
Convertible preferred stock	2,639	2,462
Series C convertible preferred stock, $.0001 par value; 625,000 shares authorized; 614,177 shares issued and outstanding as of June 30, 2017 and December 31, 2016; and $79,858 and $75,491 liquidation preference as of June 30, 2017 and December 31, 2016, respectively
Current liabilities
Convertible preferred stock	$ 74,229	$ 69,540