Leases - Additional Information (Detail) - USD ($)		6 Months Ended
	Jan. 02, 2019	Jun. 30, 2019	Jan. 01, 2019
Lessee Lease Description [Line Items]
Operating lease, options to renew term		1 year
Lessee, Operating Lease, Existence of Option to Extend [true false]		true
Operating lease, right-of-use asset		$ 500,000
Operating lease, liability		$ 643,000
Lessee, operating lease incremental borrowing rate			12.78%
Operating lease, lease not yet commenced, description		The Company did not enter into any new lease arrangements nor did it have any arrangements that had not commenced.
ASU 2016-02
Lessee Lease Description [Line Items]
Operating lease, right-of-use asset		$ 800,000	$ 800,000
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List			us-gaap:OtherAssetsNoncurrent
Adjustment for deferred rent			$ 200,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]			us-gaap:AccruedLiabilitiesCurrent
Operating lease, liability		1,000,000	$ 1,000,000
Cumulative-effect adjustment to retained earnings	$ 0	$ 0
Minimum
Lessee Lease Description [Line Items]
Lease term		1 year
Maximum
Lessee Lease Description [Line Items]
Lease term		5 years
Lease initial term of contract		1 year