Acquisition (Details) (USD $)	2 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	May 08, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Revenues		$ 4,488,932	$ 4,359,406	$ 8,544,507	$ 6,883,318
Net loss		(12,769,492)	(8,625,641)	(26,599,576)	(17,489,971)
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	10,000
Common Stock, Shares, Issued	34,939,223	34,939,223		34,939,223		5,329,593	27,196,537
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High						90,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	20,300,000	20,300,000		20,300,000
Acquisition-related contingent consideration	20,640,000	20,640,000		20,640,000		10,800,000	9,450,000
Business Acquisition, Transaction Costs						35,300,000
Cash and cash equivalents						51,200
Accounts receivable, net of allowance for doubtful accounts of $390,118 and $391,829 at March 31, 2014 and December 31, 2013, respectively						45,100
Prepaid expenses and other current assets						19,200
Property, plant and equipment, net						1,040,900
Other assets						201,000
Goodwill	26,079,536	26,079,536		26,079,536		14,961,900	11,117,770
Equity Issued in Business Combination, Fair Value Disclosure						24,500,000
Intangible assets, net						35,790,000
Accounts Payable, Current						(333,100)
Accrued Liabilities, Current						(2,014,100)
Deferred Tax Liabilities, Net, Noncurrent						(14,509,300)
Business Acquisition, Pro Forma Net Income (Loss)	(2,300,000)
Basic and diluted loss per share attributable to NeoStem, Inc. common stockholders	$ (0.07)	$ (0.40)	$ (0.46)	$ (0.88)	$ (0.99)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						35,252,800
NeoStem Oncology [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		4,982,000	4,596,000	9,255,000	7,282,000
Business Acquisition, Pro Forma Net Income (Loss)		(13,574,000)	(9,830,000)	(29,097,000)	(19,963,000)
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		(13,409,000)	(9,780,000)	(28,784,000)	(19,849,000)
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ (0.36)	$ (0.41)	$ (0.82)	$ (0.87)
NeoStem, Inc. [Member]
Business Acquisition [Line Items]
Revenues		4,489,000	4,359,000	8,545,000	6,883,000
Net loss		(12,770,000)	(8,626,000)	(26,600,000)	(17,490,000)
Net Income (Loss) Attributable to Parent		(12,605,000)	(8,575,000)	(26,287,000)	(17,376,000)
Goodwill	$ 26,079.5	$ 26,079.5		$ 26,079.5			$ 11,117.7
Basic and diluted loss per share attributable to NeoStem, Inc. common stockholders		$ (0.40)	$ (0.46)	$ (0.88)	$ (0.99)