Fair Value Measurements - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 41,000	$ 41,000
Class of warrant or right, exercise price of warrants or rights (in usd per share)			$ 11.50
2019 Refinancing Agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Class of warrant or right, number of securities called by each warrant or right (in shares)	263,314	263,314
Class of warrant or right, exercise price of warrants or rights (in usd per share)	$ 7.63	$ 7.63
Refinancing Term Loan 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 41,000	$ 41,000