Annual report pursuant to Section 13 and 15(d)

Stockholders' equity (Tables)

v3.6.0.2
Stockholders' equity (Tables)
12 Months Ended
Dec. 31, 2016
Tecogen  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Stock Option Activity
Stock option activity for the year ended December 31, 2016 was as follows:
Common Stock Options
Number of
Options
 
Exercise
Price
Per
Share
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Life
 
Aggregate
Intrinsic
Value
Outstanding, December 31, 2015
1,268,200

 
$1.20-$5.39
 
$
3.06

 
6.01 years
 
$
985,578

Granted
207,701

 
$0.79-$4.27
 
3.52

 
 
 
 

Exercised
(157,458
)
 
$1.20-$2.60
 
2.51

 
 
 
 

Canceled and forfeited
(200,525
)
 
$3.39-$4.96
 
3.73

 
 
 
 

Outstanding, December 31, 2016
1,117,918

 
$.79-$5.39
 
$
3.10

 
5.00 years
 
$
1,415,150

Exercisable, December 31, 2016
835,293

 
 
 
$
2.64

 
 
 
$
1,395,638

Vested and expected to vest, December 31, 2016
1,075,524

 
 
 
$
3.05

 
 
 
$
1,415,150

Summary of Weighted Average Assumptions Used in Black-Scholes Option Pricing
The weighted average assumptions used in the Black-Scholes option pricing model for options granted in 2016 and 2015 are as follows:
Stock option awards:
 
2016
 
2015
Expected life
 
6.25 years
 
6.25 years
Risk-free interest rate
 
1.18%-1.90%
 
1.63%-1.67%
Expected volatility
 
27.2%-32.8%
 
32.4%-32.6%
Schedule of Restricted Stock Activity
Restricted stock activity for the year ended December 31, 2016 was as follows: 
 
Number of
Restricted
Stock
 
Weighted
Average
Grant Date
Fair Value
Unvested, December 31, 2015
163,350

 
$
1.31

Granted

 

Vested
(85,842
)
 
1.31

Forfeited

 

Unvested, December 31, 2016
77,508

 
$
1.31

Ilois  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Restricted Stock Activity
Restricted stock activity for the Ilios awards, for the year ended December 31, 2016 was as follows: 
 
Number of
Restricted
Stock
 
Weighted
Average
Grant Date
Fair Value
Unvested, December 31, 2015
160,000

 
$
0.10

Granted

 

Vested at completion of merger
(160,000
)
 
0.10

Forfeited

 

Unvested, December 31, 2016

 
$