Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Percentage of Net Product Sales and Accounts Receivable Balance

The following table includes the percentage of net product sales and accounts receivable balances for our three major Customers, each of which comprised 10% or more of our net product sales:

	Net Product Sales						Accounts Receivable
	Three Months Ended June 30, 2019			Six Months Ended June 30, 2019			As of June 30, 2019
Customer A		41.3	%		41.0	%		42.0	%
Customer B		40.4	%		38.7	%		48.0	%
Customer C		15.8	%		17.9	%		8.9	%
Total		97.5	%		97.6	%		98.9	%

Summary of Activity to Product Returns, Distributor Fees and Discounts, Rebates and Administrative Fees

The following table provides a summary of activity with respect to our product returns, distributor fees and discounts, rebates and administrative fees, which are included in other accrued liabilities on the condensed consolidated balance sheets (in thousands):

	Product Returns			Distributor Fees			Discounts, Rebates and Administrative Fees			Total
Balance at December 31, 2018	$	947		$	2,813		$	21,743		$	25,503
Provision		707			8,434			66,334			75,475
Payments/credits		(41	)		(7,225	)		(54,087	)		(61,353	)
Balance at June 30, 2019	$	1,613		$	4,022		$	33,990		$	39,625

Common Stock Equivalents Excluded From Computation of Net Loss Per Share

Because we have incurred a net loss for each of the periods presented in the unaudited condensed consolidated statements of operations and comprehensive loss, the following common stock equivalents were not included in the computation of net loss per share because their effect would be anti-dilutive (in thousands):

	June 30,
	2019		2018
Stock options outstanding		13,545		12,514
Warrants outstanding		640		640
Shares of common stock underlying Convertible Notes    outstanding		8,729		8,224