Commitments and Contingencies - Additional Information (Details)						3 Months Ended	6 Months Ended
	Mar. 08, 2019 USD ($)	Mar. 05, 2019 USD ($)	Nov. 16, 2018 shares	Apr. 04, 2018 USD ($)	Jun. 09, 2016 case	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) issuer
Loss Contingencies [Line Items]
Class action cases (in cases) | case					2
Number of days to file a complaint						30 days
Number of issuers arbitration initiated with (issuers) | issuer							3
Right of termination prior written notice period				30 days
Payment for contingent consideration liability				$ 250,000
Time period supplemental unemployment benefits to be paid							18 months
Chief Executive Officer
Loss Contingencies [Line Items]
Severance benefits						$ 1,000,000.0	$ 1,000,000.0
Officers' compensation							100,000
Salary accrued						$ 900,000	900,000
Insurance Coverage Arbitration
Loss Contingencies [Line Items]
Damages sought							3,402,980
Dhingra Agreement | Restricted Units With Vesting Market Conditions
Loss Contingencies [Line Items]
Restricted stock expense (in shares) | shares			50,000
Director
Loss Contingencies [Line Items]
Officers' compensation	$ 21,372	$ 16,667					$ 100,000