Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Additional Information (Detail)

Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended			3 Months Ended			6 Months Ended					6 Months Ended	0 Months Ended			0 Months Ended		12 Months Ended		12 Months Ended	0 Months Ended			12 Months Ended		0 Months Ended	3 Months Ended	12 Months Ended
Acquisitions - Additional Information (Detail) (USD $)	Apr. 22, 2014	Aug. 22, 2013	Mar. 08, 2013	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Apr. 17, 2014	Dec. 31, 2013	Mar. 08, 2013	Jun. 30, 2014 LED Signage and Lighting Strips	Nov. 15, 2013 Tri-State DE LLC	Jun. 30, 2014 Tri-State DE LLC	Nov. 15, 2013 Tri-State DE LLC	Nov. 15, 2013 Tri-State DE LLC Common Stock	Aug. 22, 2013 Relume Technologies Inc	Dec. 31, 2013 Relume Technologies Inc	Aug. 22, 2013 Relume Technologies Inc	Dec. 31, 2013 Relume Technologies Inc Change of Control	Aug. 22, 2013 Relume Technologies Inc Common Stock	Oct. 09, 2013 Elite LED Solutions Incorporated	Mar. 08, 2013 Elite LED Solutions Incorporated	Dec. 31, 2013 Elite LED Solutions Incorporated	Mar. 08, 2013 Elite LED Solutions Incorporated	Apr. 17, 2014 Value Lighting Installment	Jun. 30, 2014 Value Lighting	Dec. 31, 2013 Value Lighting	Apr. 17, 2014 Value Lighting
Business Acquisition [Line Items]
Business acquisition cash Consideration													$ 1,800,000				$ 5,000,000						$ 500,000			$ 10,600,000
Business acquisition aggregate purchase consideration																										39,300,000
Business acquisition, number of shares issued																543,052					2,174,000		300,000			8,468,192
Business acquisition, number of Installments																										4
Business acquisition, common stock issuable installment value																										20,900,000
Business acquisition, contingent consideration															900,000										356,250				11,000,000
Business acquisition, contingent consideration preliminarily value																													7,800,000
Estimated fair value of intangible assets									19,800,000		1,599,000
Goodwill				38,457,000			38,457,000		17,000,000	21,498,000					2,786,000				8,624,000										16,959,000
Carrying amount of debt encumbering with property									2,400,000
Business acquisition, liability incurred													1,500,000
Business acquisition, liability incurred repayment term													6 months
Business acquisition, interest rate on liability incurred													5.00%
Business acquisition, value of equity issued																1,600,000					7,300,000
Contingent obligation, number of additional shares to issue																365,628
Business acquisition, net of estimated working capital adjustment														25,000					4,300,000
Proceeds from issuance of convertible preferred stock, net of issuance costs								4,968,000									5,000,000
Cash retained for working capital purposes																			700,000
Minimum percentage of Relume's outdoor lighting business		75.00%
Provision for unfavorable unconditional purchase commitments for inventory components					450,000
Transfer of goodwill							0					1,400,000
Contingent consideration, sales consulting agreement period																							5 years
Contingent consideration, monthly fees obligated to be paid																							20,000
Contingent consideration, profit sharing percentage																							3.00%
Issuance of common stock for services, (in shares)			42,735																				850,000
Common stock vesting period	3 years																						5 years
Number of unvested shares cancelled																						850,000
Stock based compensation				229,000		509,000	361,000	701,000														0
Business acquisition, charges							500,000											400,000		700,000
Amortization of intangible assets related to acquired backlog							1,885,000	1,978,000																				2,300,000
Gain on bargain purchase of business			743,000					743,000																700,000
Loss of extinguishment of debt																		4,200,000
Gain on deconsolidation of subsidiary that filed a bankruptcy petition																		1,500,000
Revenue from the date of acquisition																											11,277
Net income from the date of acquisition																											$ 21