Debt Obligations - Additional Information (Details)		1 Months Ended			12 Months Ended
	Mar. 26, 2018 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	Mar. 31, 2016 USD ($)	Aug. 31, 2014 USD ($) Institution	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 Institution	Jul. 11, 2018 USD ($)
Debt Instrument [Line Items]
Debt instrument, amortization expense					$ (12,480)	$ 195,248
Repayment of outstanding principal and interest					4,276,988
Loss on extinguishment of Growth Term Loan					105,064
Revolving loan cost					67,068
MidCap Credit Facility
Debt Instrument [Line Items]
Debt instrument, amortization expense					$ 121,611
Credit facility aggregate principal amount	$ 20,000,000
Line of credit facility interest rate at the end of the period	9.60%
Line of credit facility, expiration period	36 months
Line of credit facility first anniversary early termination fee percentage	3.00%
Line of credit facility second anniversary early termination fee percentage	2.00%
Line of credit facility third anniversary early termination fee percentage	1.00%
Origination fee	$ 100,000
Line of credit facility termination fee	4.50%
Amount required to deposit in escrow account	$ 3,300,000
Escrow deposit								$ 3,300,000
Minimum amount in deposit account subject to control agreement	$ 20,000,000
Credit facility, covenant terms					Commencing with the calendar quarter ending on the later of (a) June 30, 2019 and (b) the last day of the calendar quarter in which MidCap Tranche 2 is funded, the Company must also comply with a financial covenant relating to trailing twelve-month minimum Net Revenue requirements (as defined in the MidCap Credit Facility), tested on a quarterly basis
Credit Facility increase in interest on obligation percentage	3.00%
Percentage of weighted average closing price	150.00%
Fair value of warrants	$ 74,000
Unamortized debt discount					$ 610,359
MidCap Credit Facility | MidCap Tranche 1
Debt Instrument [Line Items]
Credit facility aggregate principal amount	$ 7,000,000
Line of credit facility interest rate	7.25%
Credit facility, basis spread on variable rate	1.25%
Credit facility, basis spread on variable rate description	one-month LIBOR
Warrants to purchase of common stock expiration year	10 years
Warrants to purchase common stock, shares | shares	18,123
Warrants exercise price | $ / shares	$ 7.73
MidCap Credit Facility | MidCap Tranche 2
Debt Instrument [Line Items]
Credit facility aggregate principal amount	$ 13,000,000
Line of credit facility interest rate	7.25%
Credit facility, basis spread on variable rate	1.25%
Credit facility, basis spread on variable rate description	one-month LIBOR
Warrants to purchase of common stock expiration year	10 years
Percentage of warrants to purchase common stock	2.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility aggregate principal amount	$ 2,000,000
Line of credit facility interest rate	4.25%
Credit facility, basis spread on variable rate	1.25%
Credit facility, basis spread on variable rate description	one-month LIBOR
Line of credit facility first anniversary early termination fee percentage	3.00%
Line of credit facility second anniversary early termination fee percentage	2.00%
Line of credit facility third anniversary early termination fee percentage	1.00%
Credit facility outstanding amount					0
Credit facility origination fee percentage	0.50%
Credit facility, unused line fee percentage	0.50%
Credit facility collateral management fee percentage	0.50%
Credit facility minimum drawn balance percentage	20.00%
Revolving loan cost					67,068	0
Amortization of deferred financing costs					12,352
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Credit facility additional borrowing capacity	$ 8,000,000
Growth Term Loan
Debt Instrument [Line Items]
Number of loan lending institutions | Institution				2			2
prepayment fee Percentage				1.00%
Debt instrument, amortization expense					62,951	404,462
Debt discount						$ 629,777
Repayment of outstanding principal and interest		$ 4,300,000
Loss on extinguishment of Growth Term Loan					105,064
Unamortized discounts					$ 67,272
Growth Term Loan A
Debt Instrument [Line Items]
Term loan payable				$ 11,000,000
Debt instrument, fixed rate				8.50%
Debt instrument, maturity date				Sep. 30, 2018
Growth Term Loan B
Debt Instrument [Line Items]
Term loan payable			$ 5,000,000
Debt instrument, fixed rate			8.75%
Debt instrument, maturity date			Sep. 30, 2018