Note 7 - Stockholders' Equity and Stock-based Compensation Expense (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Cost of revenue	$	139	$	166	$	271	$	325
Sales and marketing		148		198		219		397
Research and development		115		89		239		190
General and administrative		291		349		589		710
Total stock-based compensation expense	$	693	$	802	$	1,318	$	1,622

Schedule of Equity Awards Granted [Table Text Block]

	Shares
Stock options		177
Restricted stock units		49
Total		226