Merger - Additional Information (Details)		2 Months Ended	3 Months Ended		6 Months Ended		8 Months Ended
	May 11, 2017 USD ($) unit shares	Jun. 30, 2018 USD ($) shares	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) shares	May 10, 2017 USD ($)
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares) | shares		26,768,498	26,768,498		26,768,498		26,768,498
Merger related costs			$ 77,000	$ 1,595,000	$ 203,000	$ 2,277,000
Amortization of intangible assets			600,000	500,000	1,200,000	800,000
Goodwill		$ 8,852,000	$ 8,852,000		$ 8,852,000		$ 8,759,000
Term Loans | Term Loans
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity								$ 3,700,000
Line of Credit | Revolving Credit Facility
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity								$ 7,000,000
Provant
Business Acquisition [Line Items]
Shared issued in merger (in shares) | shares	10,448,849
Common stock, shares outstanding (in shares) | shares		26,800,000	26,800,000		26,800,000
Merger related costs			$ 0	1,600,000	$ 0	2,300,000
Increase in goodwill during measurement period							1,600,000
Amortization of intangible assets			300,000		600,000
Goodwill	$ 8,100,000						$ 8,126,000
Number of reporting units tested for goodwill impairment | unit	1
Revenues attributable to Provant since the acquisition			4,100,000	1,900,000	9,600,000	1,900,000
Provant | Addition of Transaction Costs
Business Acquisition [Line Items]
Net income (loss)				$ 2,100,000		$ 3,300,000
Provant | Cost of operations
Business Acquisition [Line Items]
Amortization of intangible assets					200,000
Provant | Selling, general and administrative expenses
Business Acquisition [Line Items]
Amortization of intangible assets					$ 100,000
Provant | Seasonal Facility | Line of Credit
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity	$ 2,000,000
Provant | Immaterial Error Correction
Business Acquisition [Line Items]
Increase in goodwill during measurement period		$ 100,000	$ 100,000
Provant | Term Loans | Term Loans
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity	6,500,000
Provant | Line of Credit | Revolving Credit Facility
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity	10,000,000
Line of credit facility, capacity available during high-volume months	$ 15,000,000.0
Provant | Former Provant Ownwers
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners		47.00%	47.00%		47.00%