Note 7 - Common Stock

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

7.

Common Stock

As of

June 30, 2018,

and

December 

31,

2017,

the Company’s amended certificate of incorporation authorizes the issuance of

142,857

shares of

$0.001

par value common stock. Reserved shares of common stock are as follows:

	June 30,		December 31,
	2018		2017
Options or RSUs available for future grant under stock option plans		779		999
RSUs outstanding under stock option plans		938		568
Options outstanding under stock option plans		548		436
Shares available for future issuance under employee stock purchase plan		208		182
Total		2,473		2,185