Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Schedule of Revenue Disaggregated by Type

Other recurring revenue represented 54% and 44% of revenue for the six months ended June 30, 2018 and 2017, respectively.

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Systems	$	310,751	$	1,828,439	$	328,026	$	2,047,334
Disposables, service and accessories		7,240,650		6,638,587		14,195,008		13,397,364
Total revenue	$	7,551,401	$	8,467,026	$	14,523,034	$	15,444,698

Summary of Contract Assets and Liabilities

The following information summarizes the Company’s contract assets and liabilities:

	June 30, 2018			December 31, 2017
Contract Assets - Unbilled Receivables	$	9,167		$	2,917
Product shipped, revenue deferred		934,136			941,724
Deferred service and license fees		6,499,720			5,372,908
Total deferred revenue		7,433,856			6,314,632
Less: Long-term deferred revenue		(523,646	)		(611,863	)
Total current deferred revenue	$	6,910,210		$	5,702,769

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted EPS:

	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
Net income (loss)	$	(632,205	)	$	(177,299	)	$	803,025		$	999,669
Cumulative dividend on convertible preferred stock		(357,518	)		(369,661	)		(711,107	)		(732,849	)
Net income attributable to convertible preferred stockholders		—			—			(42,936	)		(167,539	)
Net income (loss) attributable to common stockholders	$	(989,723	)	$	(546,960	)	$	48,982		$	99,281
Shares used for basic EPS-weighted average shares		58,926,545			22,581,330			45,019,358			22,450,392
Restricted Stock Units		—			—			267,936			8,087
Warrants		—			—			441,438			—
Weighted average number of common shares and equivalents:		58,926,545			22,581,330			45,728,732			22,458,479
Basic EPS	$	(0.02	)	$	(0.02	)	$	0.00		$	0.00
Diluted EPS	$	(0.02	)	$	(0.02	)	$	0.00		$	0.00