Restructuring - Additional Information (Details)	1 Months Ended	3 Months Ended			6 Months Ended
	May 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Position	Jun. 30, 2018 USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring charges					$ 901,000	$ 119,000
Net proceeds from sale of facility					7,400,000
SG&A [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges					901,000	0
General and Administrative Expense
Restructuring Cost And Reserve [Line Items]
Other restructuring associated costs incurred		$ 100,000			200,000
Employee Severance and Other Employee-related Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges					$ 901,000
Ameri-Kart [Member]
Restructuring Cost And Reserve [Line Items]
Elimination of positions | Position					30
Expected restructuring charges		900,000			$ 900,000
Restructuring charges		0			0
Additional expected restructuring charges		200,000			200,000
Ameri-Kart [Member] | Employee Severance and Other Employee-related Costs [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges		200,000			200,000
Ameri-Kart [Member] | Equipment Relocation and Facility Shut Down Costs [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges		600,000			600,000
Ameri-Kart [Member] | Accelerated Depreciation Charges on Property, Plant and Equipment [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges		100,000			100,000
Distribution Transformation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges		900,000			900,000
Total restructuring costs incurred		0			900,000
Additional expected restructuring charges		600,000			600,000
Material Handling [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges					0	119,000
Material Handling [Member] | SG&A [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges					0	0
Material Handling [Member] | Equipment Relocation and Facility Shut Down Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges		$ 0		$ 0	0	$ 100,000
Total restructuring costs incurred					7,700,000
Restructuring charges in employee severance and other employee-related costs					3,100,000
Restructuring charges in equipment relocation and facility shut down costs					2,600,000
Restructuring charges in accelerated depreciation charges on property, plant and equipment					$ 2,000,000
Impairment charges			$ 900,000
Net proceeds from sale of facility	$ 2,900,000