Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income (loss)	$ (2,260)	$ (11,760)	$ 15,891	$ (35,943)
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Share-based compensation expense			3,315	5,385
Depreciation expense			84	2,155
Non-cash interest expense			5,587	5,339
Inventory fair value step-up adjustment included in cost of product sales			850	1,186
Amortization of intangible assets	400	300	1,164	259
Loss on change in fair value of contingent value rights			395
Amortization of right-of-use lease assets			169	1,091
Loss on short-term investments				502
Loss on disposal of property and equipment, net of gain on lease termination				59
Changes in operating assets and liabilities:
Accounts receivable, net			(2,959)	218
Inventory, net			(931)	(1,482)
Prepaid expenses and other current assets			(875)	2,445
Accounts payable			(448)	(1,649)
Accrued expenses			4,083	(5,786)
Accrued payroll and related expenses			(1,077)	(2,168)
Lease liabilities			(168)	(1,969)
Net cash provided by (used for) operating activities			25,080	(30,358)
Investing activities
Acquisition of Tetraphase, net of cash, cash equivalents and restricted cash acquired				(33,513)
Proceeds from the sale of property and equipment				3,070
Purchases of property and equipment			(9)
Proceeds from the sale of short-term investments				2,497
Purchases of short-term investments				(2,999)
Net cash used for investing activities			(9)	(30,945)
Financing activities
Net proceeds from issuance of common stock under ESPP			317	428
Net proceeds from issuance of common stock under 2013 Equity Plan			156	605
Net cash provided by financing activities			473	1,033
Net increase (decrease) in cash, cash equivalents and restricted cash			25,544	(60,270)
Cash, cash equivalents and restricted cash, beginning of period			21,261	88,729
Cash, cash equivalents and restricted cash, end of period	46,805	28,459	46,805	28,459
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents	46,765	27,760	46,765	27,760
Restricted cash	40	699	40	699
Cash, cash equivalents and restricted cash, end of period	$ 46,805	$ 28,459	$ 46,805	$ 28,459