Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

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
	Year Ended December 31, 2021			As of December 31, 2021
Customer A		44.7	%		50.2	%
Customer B		34.9	%		33.8	%
Customer C		19.2	%		15.3	%
Total		98.8	%		99.3	%

Common Stock Equivalents Excluded From Computation of Net Loss Per Share

Because we have incurred a net loss for all periods presented in the 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):

	December 31,
	2021		2020		2019
Stock options outstanding		18,944		18,912		16,665
Restricted stock units outstanding		2,803		603		—
Warrants outstanding		—		220		508
Shares of common stock underlying convertible    notes outstanding		9,819		9,510		8,960