Note 11 - Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Month Period Ended				Six Month Period Ended
	June 30,				June 30,
	2018		2017		2018		2017
Net product sales:
Regenerative medicine	$	2,985,086	$	1,083,637	$	5,088,638	$	2,134,807
Distributors		1,695,153		694,366		2,734,396		1,454,054
Drug discovery		263,023		488,894		639,998		766,808
BioBanking		234,592		290,868		529,704		568,297
Total	$	5,177,854	$	2,557,765	$	8,992,736	$	4,923,966