Convertible Preferred Stock (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares		1,000,000	1,000,000
Transaction fees on issuance of stock		$ 6	$ 115
Liquidation value		$ 1,000
Liquidation value (in dollars per share) | $ / shares		$ 96.0
Series A Preferred Stock
Class of Stock [Line Items]
Conversion ratio for convertible preferred stock		100.91
Securities Purchase Agreement | Series A Preferred Stock
Class of Stock [Line Items]
Number of shares issued (in shares) | shares	9,926
Transaction fees on issuance of stock	$ 200
Dividend rate (as percent)		5.00%
Wipro | Securities Purchase Agreement | Series A Preferred Stock
Class of Stock [Line Items]
Number of shares issued (in shares) | shares	9,926.000
Par value (in dollars per share) | $ / shares	$ 1.00
Consideration received on transaction	$ 9,900
Dividend rate (as percent)	5.00%