Note I - Net Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Warrants to purchase common stock		2,027,763		2,027,763		2,027,763		2,027,763
Awards under equity incentive plans		3,707,421		2,872,769		3,707,421		2,872,769
Deerfield Convertible Note		1,167,607		1,751,410		1,167,607		1,751,410
2021 Notes		5,040,914		5,040,914		5,040,914		5,040,914
Total securities excluded from the calculation of weighted average number of shares of common stock outstanding		11,943,705		11,692,856		11,943,705		11,692,856