Income Taxes - Additional Information (Details)		12 Months Ended
	May 11, 2017 USD ($)	Dec. 31, 2017 USD ($) state	Dec. 31, 2016 USD ($) state
Tax Credit Carryforward [Line Items]
Current federal tax expense		$ 0	$ 0
Number of states with state tax liability | state		1	1
Change in ownership percentage, threshold for utilization of net operating losses	50.00%	50.00%
Change in ownership, period for utilization of net operating losses carryforwards		3 years
Net operating loss carryforwards subject to expiration		$ 6,520,000	$ 70,203,000
Net operating loss carryforward subject to annual limitation		200,000
Provant
Tax Credit Carryforward [Line Items]
Change in ownership, period for utilization of net operating losses carryforwards	2 years
Net operating loss carryforward subject to annual limitation	$ 100,000
Income tax benefit recognized due to release of valuation allowance at merger	$ 700,000
Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforward		19,900,000
Federal | Operating Loss Carryforwards
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards subject to expiration		173,100,000
State
Tax Credit Carryforward [Line Items]
Net operating loss carryforward		19,300,000
State | Operating Loss Carryforwards
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards subject to expiration		$ 140,400,000