Acquisitions - Summary of Final Allocation of Total Consideration to the Acquired Net Assets (Details) - USD ($)	Sep. 30, 2019	Apr. 30, 2019	Dec. 31, 2018	Oct. 31, 2018	Aug. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 7,120,510		$ 7,914,211
Concept Development Inc
Business Acquisition [Line Items]
Cash	139,634
Accounts receivable	489,267
Prepaid expenses	45,683
Inventories	205,635
Property and equipment	45,026
Deposits and other	12,526
Intangibles		$ 575,000			$ 1,770,000
Accounts payable	(91,997)
Accrued expenses	(99,711)
Deferred revenue	(95,610)
Deferred income taxes	(258,301)
Other accrued liabilities	(50,985)
Working capital loan	(370,096)
Total fair value excluding goodwill	546,071
Goodwill	4,295,361	1,195,000			3,100,361
Total consideration	4,841,432
Concept Development Inc | Customer Lists and Relationships
Business Acquisition [Line Items]
Intangibles	470,000	470,000			1,470,000
Concept Development Inc | Trade Name
Business Acquisition [Line Items]
Intangibles	90,000	90,000			100,000
Concept Development Inc | Non-Compete
Business Acquisition [Line Items]
Intangibles	$ 15,000	$ 15,000			$ 200,000
Bressner Technology
Business Acquisition [Line Items]
Cash				$ 560,932
Accounts receivable				2,238,881
Inventories				3,721,685
Prepaid expenses and deposits				124,491
Property and equipment				346,637
Intangibles				1,777,110
Accounts payable and accrued expenses				(2,076,450)
Notes payable				(2,536,148)
Deferred income taxes				(43,499)
Total fair value excluding goodwill				4,113,639
Goodwill				1,489,722
Total consideration				5,603,361
Bressner Technology | Customer Lists and Relationships
Business Acquisition [Line Items]
Intangibles				1,215,798
Bressner Technology | Trade Name
Business Acquisition [Line Items]
Intangibles				329,515
Bressner Technology | Non-Compete
Business Acquisition [Line Items]
Intangibles				$ 231,797