Warrants - Additional Information (Detail)				1 Months Ended			6 Months Ended	12 Months Ended
	Sep. 07, 2018 shares	Jul. 11, 2018 USD ($) shares	Jun. 29, 2018 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	Aug. 31, 2017 shares	May 31, 2017 shares	Jun. 29, 2018 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Dec. 31, 2017 shares
Class of Warrant or Right [Line Items]
Replacement warrants issued in connection with the Mergers						155
Issuances					78,181			3,052,959	7,342,530
Conversion of warrants into common stock and cash								1,550	76,569
Warrants outstanding								10,384,706	7,344,297		78,336
Stock price per share | $ / shares								$ 0.0001	$ 0.0001
Cash proceeds from common stock | $									$ 4,334,816
Gain on exchange of warrants | $								$ 779,923
Exchange consideration discounted percentage							0.05
Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Face value of preferred stock | $										$ 2,364,044
First Exchange Warrants [Member]
Class of Warrant or Right [Line Items]
Stock issued for exchange of warrants, shares			53,125				53,125	73,530
Issuance of common stock for the exchange of warrants			167,700
Stock price per share | $ / shares			$ 12.60				$ 12.60
Convertible notes principal balance | $			$ 1,500,000				$ 1,500,000	$ 1,500,000
Cash proceeds from common stock | $			$ 1,100,000
Proceeds from exchange of warrants | $								4,727,000
Converted value in excess of principal | $				$ 3,467,935
Gain on exchange of warrants | $								(3,593,082)
Transaction costs | $								125,147
First Exchange Warrants [Member] | Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Face value of preferred stock | $								$ 2,364,044
Second Warrants Exchange [Member]
Class of Warrant or Right [Line Items]
Stock issued for exchange of warrants, shares		22,523
Stock price per share | $ / shares								$ 8.64
Number of shares issued		32,124
Additional number of shares issued		145,038
Second Warrants Exchange [Member] | Series B Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Number of shares issued		32,124
Proceeds from issuance of warrants | $		$ 22,241
Third Warrants Exchange [Member]
Class of Warrant or Right [Line Items]
Stock issued for exchange of warrants, shares	921
Stock price per share | $ / shares								$ 8.85
Number of shares issued	5,929
Warrants Issued with Redeemable Preferred [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding								62	1,612