Note 4 - Prepaid Expenses and Other Current Assets (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Prepaid Expenses and Other Current Assets [Table Text Block]

	March 31, 2019		December 31, 2018
Prepaid service invoices	$	91	$	79
Prepaid manufacturing and mold costs		95		91
Prepaid insurance premiums		125		193
Total	$	311	$	363