Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) reporting_unit segment shares	Dec. 31, 2017 USD ($) shares	Jan. 01, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Number of operating segments | segment	2
Change in fair value of contingent consideration liability	$ (450,000)
Contingent consideration liability	2,500,000	$ 3,000,000
Deferred compensation liability	3,400,000	3,900,000
Net rental loss on rental contracts	(865,000)	(683,000)
Change in fair value of contingent consideration	(450,000)	(1,000,000)
Capitalized software costs	3,900,000	3,800,000
Amortization of capitalized software costs	3,500,000	2,700,000
Impairment of intangible assets	0	0
Impairment of capitalized software	$ 1,600,000	0
Number of reportable units | reporting_unit	2
Goodwill, Impaired, Method For Fair Value Determination, Percentage Of Fair Value Calculation	80.00%
Weighting of valuation method	10.00%
Goodwill, measurement input	3.00%
Amount outstanding for goodwill within continuing operations	$ 11,051,000	11,051,000
Impairment of goodwill	0	0
Impairment of long-lived assets	1,585,000	0
Net loss	24,122,000	3,386,000
Net cash outflow, operating activities	$ 3,849,000	$ (314,000)
Employee Stock Option
Property, Plant and Equipment [Line Items]
Incremental shares excluded from computation of diluted earnings per share (in shares) | shares	750	266
Restricted Stock
Property, Plant and Equipment [Line Items]
Incremental shares excluded from computation of diluted earnings per share (in shares) | shares	113	49
Minimum
Property, Plant and Equipment [Line Items]
Warranty period	12 months
Estimated useful lives	3 years
Goodwill, Impaired, Method For Fair Value Determination, Discounts Rate	14.00%
Minimum | Subsequent Event | Forecast | ASU 2016-02
Property, Plant and Equipment [Line Items]
Operating lease, ROU asset			$ 4,000,000
Operating lease liability			4,000,000
Minimum | Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Useful life of intangibles	3 years
Maximum
Property, Plant and Equipment [Line Items]
Warranty period	36 months
Estimated useful lives	25 years
Goodwill, Impaired, Method For Fair Value Determination, Discounts Rate	29.00%
Maximum | Subsequent Event | Forecast | ASU 2016-02
Property, Plant and Equipment [Line Items]
Operating lease, ROU asset			4,500,000
Operating lease liability			$ 4,500,000
Maximum | Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Useful life of intangibles	7 years
Brink Software
Property, Plant and Equipment [Line Items]
Change in fair value of contingent consideration liability	$ (500,000)	$ (1,000,000)