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Long-Term Debt - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
	May 14, 2019	Mar. 31, 2020	Mar. 16, 2020	Mar. 11, 2020
Debt Instrument [Line Items]
Long-term debt		$ 50,000
Loan Agreement
Debt Instrument [Line Items]
Interest bearing rate upon customary events	4.00%
Warrants exercisable shares of common stock	16,446
Warrants expire term	10 years
Aggregate repurchase price of warrants	$ 500
Adjustments to additional paid-in-capital, warrants issued		300
Fair value of warrant liabilities	400
Interest expense		$ 700
Term Loans
Debt Instrument [Line Items]
Aggregate amount of debt instrument	$ 25,000
Debt instrument, additional borrowing capacity amount			$ 25,000	$ 25,000
Debt instrument, interest rate percentage	7.25%	5.00%
Debt instrument, description		Under the original Loan Agreement, monthly payments consisted of interest-only through May 31, 2021. On March 11, 2020, the Company entered into the first amendment (the “Amendment”) to the Loan Agreement. Pursuant to the Amendment, the interest-only payment period was extended either (i) until December 31, 2021, if the Company receives positive data from its Phase 3 clinical trial in H. pylori infection sufficient to file a New Drug Application (“NDA”) with the U.S. Food and Drug Administration (“FDA”); or (ii) until November 30, 2022, if the Company receives positive data from its Phase 3 clinical trials in both indications for vonoprazan sufficient to file an NDA with the FDA;
Debt instrument, maturity date	May 01, 2024
Debt instrument, final payment fee percentage	8.25%
Debt instrument, final payment fee	$ 4,100	$ 4,100
Debt issuance costs	$ 200
Long-term debt		50,000
Accrued interest		$ 200
Term Loans | Maximum
Debt Instrument [Line Items]
Debt instrument, prepayment fee percentage of outstanding principal amount	2.00%
Term Loans | Prime Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.75%

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