Common Stock Warrants - Additional Information (Detail) - shares	12 Months Ended
Dec. 31, 2020	Aug. 31, 2020	Feb. 29, 2020
Class of Warrant or Right [Line Items]
Expiry of warrants	40,000
Common Stock
Class of Warrant or Right [Line Items]
Warrants issued to purchase shares of common stock (in shares)		40,000	10,000
Common stock issued upon exercise of warrants (in shares)		29,209	7,250

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant