Net Income Loss Per Share Attributable to Gaiam, Inc. Common Shareholders - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Common stock shares excluded from computation of dilutive earnings per share	1,072,000	1,416,000	1,537,000	1,379,000