Business Combination - Additional Information (Detail)						6 Months Ended
	Jul. 01, 2017 USD ($)	Jul. 01, 2017 USD ($)	Jan. 20, 2017 USD ($)	Jan. 01, 2017	Apr. 14, 2016 USD ($) shares	Jun. 30, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Apr. 14, 2016 SEK SEK / shares
Business Acquisition [Line Items]
Business acquisition deferred payment consideration						$ 1,064,000		$ 5,700,000
Noncontrolling interest						$ 155,000	$ 279,000
Price per share of Allenex used to determine fair value of non controlling interest | $ / shares						$ 1.11
Allenex [Member]
Business Acquisition [Line Items]
Percentage of share acquired					98.30%				98.30%
Total purchase price combination of cash and common stock					$ 34,100,000
Cash distribution to acquire business, gross					$ 26,900,000
Common stock, shares issue | shares					1,375,029
Common stock value					$ 7,200,000
Business acquisition deferred payment consideration					5,700,000	$ 6,300,000			SEK 50,620,000
Business acquisition deferred payment date						Jul. 01, 2017
Escrow deposit					$ 8,000,000
Business acquisition deferred payment extended date						Jul. 01, 2017
Percentage of non controlling interest					1.70%				1.70%
Noncontrolling interest					$ 600,000	$ 155,000	$ 279,000		SEK 5,100,000
Price per share of Allenex used to determine fair value of non controlling interest | SEK / shares									SEK 2.48
Allenex [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Business acquisition of related cost expenses						3,800,000
Allenex [Member] | Six-Month Bridge Loan [Member]
Business Acquisition [Line Items]
Business acquisition of debt financing cost						$ 2,900,000
Allenex [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Business acquisition deferred payment extended date		Mar. 31, 2019
Allenex [Member] | Maximum [Member]
Business Acquisition [Line Items]
Business acquisition deferred payment date						Mar. 31, 2017
Allenex [Member] | Maximum [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Business acquisition deferred payment extended date		Mar. 31, 2019
Allenex [Member] | Majority Shareholder [Member]
Business Acquisition [Line Items]
Percentage of accruing interest				10.00%
Allenex [Member] | Majority Shareholder [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Business acquisition deferred payment consideration	$ 500,000	$ 500,000
Conexio [Member]
Business Acquisition [Line Items]
Acquisition related quarterly payments, percentage on gross revenue			20.00%
Conexio [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Consideration to be paid for finished and unfinished goods acquired	$ 500,000
Conexio [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquisition related quarterly payments on gross revenue			$ 700,000
Obligations and liabilities assumed for product warranty claims			$ 35,000