Note 7 - Borrowings (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2019

Dec. 31, 2018

Notes Tables

Schedule of Debt [Table Text Block]

Year Ending December 31,
2019 (remaining three months of the year)	$	—
2020		799
2021		3,403
2022		5,522
2023		3,981
		13,705
Less: Amount of PIK additions and final facility fee to be accreted subsequent to September 30, 2019		(4,497	)
Less: Amount representing debt financing costs		(630	)
Borrowings, as of September 30, 2019	$	8,578

	Principal and PIK
Period Ending December 31,	Loan Repayments
2019	$	—
2020		—
2021		—
2022		—
2023 and after		2,000
		2,000
Add: PIK		6,243
		8,243
Less: Amount representing debt financing costs		(757	)
Borrowings, as of December 31, 2018	$	7,486