Expiration date of warrants held.

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Fair value of warrants issued

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Loss on exchange of warrants

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Percentage of warrants held by investors to participate in warrant exercise offer

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Warrants exercised during the period, shares

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Number of warrants or rights outstanding.

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Amount of expense (income) related to adjustment to fair value of warrant liability.

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The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Stockholders' Equity - Warrant Transactions (Details) - USD ($)			6 Months Ended	12 Months Ended
	Aug. 14, 2017	Jan. 22, 2015	Jun. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Aug. 14, 2015	Jul. 20, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value adjustment of warrants						$ 7,178,035
Loss on exchange of warrants				$ 0	$ 0	(1,845,810)
Fair value of warrants issued				0	0	51,950
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right		5,000	12,500
Class of warrant or right, exercise price of warrants or rights		$ 10.20	$ 10.20
Investment Warrants Expiration Date		Jan. 22, 2020	Jun. 30, 2020
Warrants and rights outstanding		$ (7,700)	$ (44,250)
Proceeds from issuance of warrants		$ 100
2014 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrants or rights discount on warrant exercise price							26.00%
2013 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrants or rights discount on warrant exercise price							25.00%
2013 and 2014 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of warrants held by investors to participate in warrant exercise offer								70.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to additional paid in capital, share-based compensation, requisite service period recognition (in dollars)				635,427	748,092	705,466
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to additional paid in capital, share-based compensation, requisite service period recognition (in dollars)						7,600
General and Administrative Expense [Member] \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to additional paid in capital, share-based compensation, requisite service period recognition (in dollars)				573,338	658,509	657,387
Cost of revenue [Member] \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to additional paid in capital, share-based compensation, requisite service period recognition (in dollars)				$ 13,381	$ 18,903	14,534
2013 and 2014 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Loss on exchange of warrants						(1,845,810)
Class of warrant or right, exercise price of warrants or rights							$ 5.87
Proceeds from issuance of warrants	$ 12,861,057
Series A 2013 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights							5.00
Series A 2014 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights							7.00
Series B 2013 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights							10.00
Series B 2014 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights							$ 10.00
2014 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Loss on exchange of warrants						(1,197,821)
Fair value of warrants issued	5,348,408
Class of warrant or right, number of securities called by warrants or rights							(1,392,832)
Warrants and rights outstanding							$ (1,181,638)
Class of warrant or right, outstanding							(396,536)
Class of warrants or rights discount on warrant exercise price							26.00%
Proceeds from issuance of warrants	8,760,805
2013 Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value adjustment of warrants						647,989
Loss on exchange of warrants						$ (647,989)
Class of warrant or right, number of securities called by warrants or rights							(798,715)
Class of warrants or rights discount on warrant exercise price							25.00%
Proceeds from issuance of warrants	$ 4,100,252
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants exercised during the period, shares						2,191,547