Convertible Notes - General Information (Details) - Convertible Notes Payable [Member] - USD ($) $ in Thousands	Sep. 23, 2019	Mar. 31, 2020
Debt Instrument [Line Items]
Aggregate principal amount	$ 80,500	$ 80,500
Interest rate (as percentage)	4.25%
Implied estimated effective rate	12.30%
Number of shares per $1,000 principal amount of Notes	83.3021
Notes at fair value	$ 57,900
Capital in excess of Par Value	22,600
Initial purchasers discount	3,220
Other costs	300
Issuance costs	3,500	$ 2,328
Issuance costs relating to Additional Paid-In Capital	1,000
Convertible senior notes	$ 2,500
Percentage of aggregate principal amount of outstanding of notes due and payable	25.00%
Scenario, One [Member] | Minimum [Member]
Debt Instrument [Line Items]
Number of trading days	20 days
Percentage of conversion price (as a percent)	130.00%
Scenario, One [Member] | Maximum [Member]
Debt Instrument [Line Items]
Total number of trading days	30 days
Scenario, Two [Member] | Minimum [Member]
Debt Instrument [Line Items]
Number of trading days	5 days
Scenario, Two [Member] | Maximum [Member]
Debt Instrument [Line Items]
Total number of trading days	10 days
Percentage of conversion price (as a percent)	98.00%