Debt Facilities - Senior Credit Facility - Additional Information (Details) - USD ($)	Aug. 17, 2018	Mar. 05, 2018	Sep. 30, 2018	Jun. 30, 2018
Line Of Credit Facility [Line Items]
Term loan outstanding amount			$ 23,916,000
Equipment Term Loan Facility
Line Of Credit Facility [Line Items]
Amount of outstanding borrowings		$ 1,100,000
General Corporate Purposes
Line Of Credit Facility [Line Items]
Amount of outstanding borrowings		11,000,000
Term Loan
Line Of Credit Facility [Line Items]
Term loan		20,000,000
Amount of outstanding borrowings		$ 7,900,000
Term loan outstanding amount				$ 20,000,000
Line of credit facility, amortization period		36 months
Line of credit facility, mature date		Mar. 01, 2022
Term Loan | Term Loan Prepaid After March 5,2019, But On or Before March 5, 2020
Line Of Credit Facility [Line Items]
Percentage of prepayment fee		1.00%
Term Loan | Term Loan Prepaid On or Before August 17, 2019
Line Of Credit Facility [Line Items]
Percentage of prepayment fee		2.00%
Line of Credit
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 4,000,000
Amount of outstanding borrowings			3,900,000
Line of credit facility, amortization period	48 months
Line of credit facility, mature date	Aug. 01, 2022
Line of credit facility, beginning date	Sep. 01, 2018
Line of Credit | Silicon Valley Bank
Line Of Credit Facility [Line Items]
Term loan outstanding amount			23,900,000
Unamortized debt issuance costs			$ 122,000
Line of Credit | Term Loan Prepaid On or Before August 17, 2019
Line Of Credit Facility [Line Items]
Percentage of prepayment fee	2.00%
Line of Credit | Term Loan Prepaid After August 17, 2019, but on or before August 17, 2020
Line Of Credit Facility [Line Items]
Percentage of prepayment fee	1.00%
Revolving Credit Facility
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 25,000,000
Amount of outstanding borrowings				$ 0
Revolving Credit Facility | LIBOR Rate 1
Line Of Credit Facility [Line Items]
Line of credit facility, basis rate	2.75%
Revolving Credit Facility | LIBOR Rate 2
Line Of Credit Facility [Line Items]
Line of credit facility, basis rate	4.00%
Revolving Credit Facility | Prime Rate 1
Line Of Credit Facility [Line Items]
Line of credit facility, basis rate	0.00%
Revolving Credit Facility | Prime Rate 2
Line Of Credit Facility [Line Items]
Line of credit facility, basis rate	1.25%
Letter of Credit
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		5,000,000
Term Loan
Line Of Credit Facility [Line Items]
Term loan incurred		$ 9,000,000
Term Loan | Line of Credit | Silicon Valley Bank
Line Of Credit Facility [Line Items]
Interest rate			6.00%
Equipment Term Loan Facility | Line of Credit | Silicon Valley Bank
Line Of Credit Facility [Line Items]
Interest rate			6.50%