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Stock-based Compensation - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Jan. 31, 2013 Brightcove KK [Member]	Mar. 31, 2013 Brightcove KK [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,699	$ 947
Unrecognized stock-based compensation expense	$ 13,927
Weighted average period	2 years 4 months 10 days
Cumulative ownership interest			37.00%	37.00%

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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